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Polyphasic Sleep: Facts and Myths Dr Piotr Wozniak
January 2005 (updated)
This article compares polyphasic sleep to regular monophasic sleep, biphasic sleep, as well as to the concept of free-running sleep. The follow-up to this article written in 2010 is available here.

Contents

The law of accelerating returns

We live in the times of accelerating acceleration. The Moore's Law makes the world smaller, faster, more connected and more efficient. We are now able to touch and feel Kurzweil's generalization: the law of accelerating returns . The fast-living young generation is hungry for more. More fun, more information, more accomplishment, more education and ... more waking time.

At the same time, the myth-making power of the human mind is now grotesquely amplified by the all-mighty Internet. If there is an idea that could make life better or more bearable, it quickly takes on its own Internet life as soon as it is invented. Along the rules of the memetic science, the idea grows, mutates and evolves. It feeds freely on science as well as on rumor, self-experiment, and unscrupulous sources biased by self-interest ready to trade truth for profits. It snowballs adding new pleasing facts and hypotheses as it rumbles over the unprepared minds. Like a new messiah, it drags behind new followers, advocates, apostles and die-hard guerillas ready to contribute to the ultimate victory of the cause.

Around the year 2000, a new meme cropped up in several blogs on the net: The Uberman's Sleep Schedule. Due to my interest in the role of sleep in memory and learning, it did not take long for the meme to hit my Inbox. As the concept balloons on a monthly basis, it leaves me little choice but to take a stand. This article is intended to separate facts from the myth to the best of my present ability to research the subject.

The Uberman's Sleep Schedule

The idea behind the Uberman's Sleep Schedule is to gain waking hours by sleeping the total of just 3 hours in 6 portions distributed equally throughout the day. There are many variants of the scheme proposed by those who tried to sleep along the schedule. The schedule is supposed to compress physiologically less important stages of sleep and homeostatically upregulate stages vital for mental health.

The Uberman's Sleep Schedule was proposed in this blog at Everything2. The blog reported a sleep experiment with an innocent ending: the admission that the Uberman schedule was incompatible with the experimenter's schedule and goals. Yet the meme was picked up in a Kuro5hin article in 2002. Phrased in a simple and well-structured language, this time it was noticed. Again, the post ended with "Uberman's sleep schedule is a potentially dangerous way to increase your waking hours". That did not prevent a frenzy of new followers ready to gain years of waking time. The catchy theme of the concept is that, indeed, if you succeeded in sleeping 3 hours per day instead of the prescribed 8, starting at 20 years of age, you would gain over 11 years in an average Western lifespan. The idea is very attractive. No wonder then that as such it seems to be gaining momentum. 

Polyphasic sleep

More and more frequently, Uberman's Sleep Schedule was being referred to as polyphasic sleep (the term popularized by research and book by an Italian chronobiologist Dr. Claudio Stampi).

Polyphasic sleep is known to sleep researchers as a variant of a sleep pattern that is set in opposition to monophasic sleep. In monophasic sleep, an individual or an animal sleeps in a single block during a single wake-sleep cycle of 24 hours. Polyphasic sleep is also set apart from a biphasic sleep in which there are two blocks of sleep in 24 hours, i.e. the night sleep and the typical Latin siesta - the "6th hour nap".

Polyphasic sleep is quite widespread in animal kingdom. In a recapitulation of phylogeny, human babies also sleep polyphasically, and gradually lose their nap slots until they become roughly biphasic around the age of one. Human adults, as much as all great apes, are largely biphasic. Although a majority of westerners do not nap on a regular basis their alertness shows a slump in alertness in the middle of the subjective day. This slump can consolidate in a short block of sleep in free-running conditions.

The theory behind the Uberman's Sleep Schedule is that with some effort, we can entrain our brain to sleep along the ancient polyphasic cycle and gain lots of waking time on the way, mostly by shedding the lesser important stages of sleep (e.g. shortening Stage 1 of NREM, which seems to be just a transition state to the more "useful" stages of slow wave sleep).

To sleep or not to sleep polyphasically

Having presented polyphasic sleep as seen by its enthusiastic advocates, let us have a look at its physiological roots and implications. With every passing month, we accumulate a tremendous body of evidence of the vital role the sleep plays in memory and creativity. In addition, most of us have a good understanding that without sleep there is little chance for an intellectual accomplishment. Even more, we find it hard to stay awake unassisted for longer than 2 days. Although, super-human achievements have been well documented, where people like Peter Tripp (1959) and Randy Gardner (1965) stayed (semi-)awake for 8 and 11 days respectively, most of the mere mortals cannot even suffer through the first 48 hours of wakefulness and inevitably fall prey to slumber.

EEG measurements indicate that humans are basically biphasic. There is a single powerful drive to sleep during a subjective night, and a single dip in alertness in the middle of the subjective day. EEG measurements are confirmed by many other physiological variables such as temperature measurements, cortisol levels in the blood, melatonin level in the saliva, levels of other hormones, blood pressure, gene transcription, immune cell activity, subjective alertness, motor activity, and countless other parameters. 

At the root of this periodicity is the activity of the suprachiasmatic nucleus (SCN) in the brain, which is driven by a 24 hour cycle of gene transcription changes running a classic feedback loop [ref: clock] . Tiny mutations in the genes responsible for circadian periodicity may lengthen or shorten the period of the circadian cycle. They can also lead to complete arythmicity. Many of such mutations have been studied in fruit flies and in mice. Human mutations leading to sleep phase disorders are also known (e.g. familial ASPS). However, for a vast majority of healthy humans, the length of the period is slightly longer than 24 hours. Dr Charles Czeisler has measured it to be 24.2 hours with amazingly little variation among individuals within the sample studied [ref: 24h]. The circadian cycle (incl. the gene transcription and the activity of the SCN) can be prodded and shifted slightly on a daily basis. The degree of the shift is determined by the phase response curve (PRC) and requires a very precise timing of the phase-shifting stimulus [ref: PRC]. In other words, with a stimulus such as light, physical activity, or social interaction, we can move the period of maximum sleepiness slightly. Although the precise measurements of the PRC speak of the possible shift of up to 3 hours in a single day with a single strong stimulus, it is hard, in practice, to shift one's circadian rhythm by more than 1 hour per day. We all get a little backward prod daily when we try to fit the 24 hour day. This daily resetting is painless for those who apply the principles of sleep hygiene. It occurs in the morning with light, activity, and/or stress. An increasing portion of the population use the alarm clock to do the job that should naturally by done by sunlight. This is not a healthy solution and is usually forced by our electrically-lit lifestyle with evening TV, evening reading, evening Internet, evening partying, etc. For those out of phase, it is easier to shift the sleep schedule to later hours (e.g. by activity late in the night) than it is to shift it back (e.g. by bright light in the morning). This asymmetry comes from the fact that we can consciously control the waking hours, which can only be used for a forward shift. It is easy to will oneself to stay up late. It is far harder to will oneself to wake up early. Naturally, an alarm clock can be used to accomplish the latter, but use of alarms should be avoided in chronotherapy and in healthy sleep due to disruptive effect of alarms on the progression of sleep cycles. 

It is possible to shift the sleep phase. However, we do not know any biological mechanisms that could be used to reduce the length of a healthy sleep block without inducing a degree of sleep deprivation. Shifting the sleep phase has a relatively small effect on the length of the sleep block. The change is proportional to the degree of shift and has the same sign (i.e. shift delays reduce the length of subjective night sleep). Most importantly, the change reverts to baseline shortly after the shift. This illustrates the homeostatic nature of sleep control mechanisms that respond to phase-shifting stimuli by stabilizing the new sleep schedule at the new offset within a very short time (assuming little shifts generated by well-timed shifting stimuli).

Those well-defined effects of natural sleep affecting stimuli on sleep patterns lead to an instant conclusion: the claim that humans can adapt to any sleeping pattern is false. A sudden shift in the schedule, as in shift work, may lead to a catastrophic disruption of sleep control mechanisms. 25% of North American population may work in variants of shift schedule. Many shift workers never adapt to shifts in sleep patterns. At times, they work partly in conditions of harmful disconnect from their body clock, and return to restful sleep once their shift returns to their preferred timing. At worst, the constant shift of the working hours results in a loss of synchrony between various physiological variables and the worker never gets any quality sleep. This propels an individual on a straight path to a volley of health problems, which include cardiac disorders, suppression of the immune system, diabetes, gastrointestinal disorders, obesity, depression, chronic fatigue, sleep disorders, etc. Shift-workers are also at a higher risk of accidents and family problems (e.g. experiencing higher divorce rate). Shift-work should apply the laws of chronobiology to minimize the adverse effects on health. It is often better to keep workers working by night on a constant basis than to induce a regular jet lag and stress on a weekly basis by a cycle of never-ending schedule shifts.

It appears that polyphasic sleep encounters the precisely same problems as seen in jet lag or shift-work. Human body clock is not adapted to sleeping in patterns other than monophasic or biphasic sleep. In other words, the only known healthy alternatives are: (1) a single 6-8 hours sleep block in the night, or (2) a night sleep of 5-7 hours combined with a 15-90 min. siesta nap. Those numbers differ substantially across the population and there is no single recommended dose of sleep for everyone. 

If a degree of pressure is exerted on the body clock, e.g. by going to sleep later than the body's optimum, the mid-day nap may serve as a compensatory buffer counteracting sleep deprivation. In such conditions, the nap may last longer than the usual 15-30 minutes. The more pressure is applied on the night sleep, the longer the siesta nap. Similar biphasic consolidation can also be produced experimentally in rats. It appears that with sufficient pressure, the nap may become longer than the night sleep, effectively reversing the sleep pattern by 12 hours. This effect confirms an important biphasic nature of the human sleep that is not fully accounted for by the present sleep models. In rare cases, individuals may learn to sleep in two blocks of 3-4 hours; however, in a vast majority of cases, the pattern in which sleep occurs in two equal blocks within 24 hours in unstable. In other words, individuals on the proportional biphasic schedule quickly fall back to long-night sleep and short siesta sleep, or back to monophasic sleep. Often, the portion of sleep that occurs during darkness takes the role of the night sleep. However, it is more likely, that this role is taken by that portion of sleep that was longer before the establishment of the proportional biphasic pattern. This again indicates the underlying physiological asymmetry between two sleep blocks in a biphasic pattern. In other words, the body remembers which sleep block is the subjective night block, even if that block happens to occur during the light period.

Through sleep deprivation, by employing the homeostatic component of sleepiness, polyphasic sleepers can increase the number of naps during the day to three. However, the pattern of one night sleep and three daily naps in highly unstable, and can be maintained only with a never-ending degree of sleep deprivation. Naturally, if you happen to use an alarm clock, you can easily run multiple "naps" during your circadian low-time during the subjective night. This is not possible during the subjective day (except in conditions of extreme sleep deprivation). To a degree, an alarm clock can also be replaced with your internal alarm (e.g. thinking "I must get up in 20 minutes"). None of "naps" executed in similar conditions will do the job of natural sleep. They are not only a waste of time, but they also contribute to dismantling your sleep control mechanisms. Dr Stampi's research on polyphasic sleep has also clearly identified the forbidden zones for sleep where naps are very difficult to initiate without substantial sleep deprivation. Those zones map well on the biphasic rhythm with the subjective evening naps preceding the core night sleep particularly ineffective for rested individuals. All the above findings inevitably lead to a conclusion that it is not possible to maintain a polyphasic sleep schedule and retain high alertness and/or creativity! As it will be shown later, practice is no less lenient in judging the impracticability of polyphasic sleep for creative individuals.  

Anecdotal evidence seems to indicate that highly creative individuals perform best in a biphasic sleep pattern. However, the only valid rule of a thumb for maximizing creativity and alertness is to sleep then and only then when you feel sleepy. When this rule is applied, individuals may fall into a number of diverse schedules. They might be quite effective in any of these exemplary mono- and biphasic patterns: typical 7+2 or 6+1, long sleeper's 9+0, short sleeper's 3+1, or even 3+0, etc. Only you yourself can determine which schedule is optimum in your case. However, you can expect that if you are a normal healthy individual, this schedule will not be polyphasic. If you attempt 3+0.5+0.5+0.5, you will either be seriously sleep deprived (i.e. you will maintain the schedule only with the help of an alarm clock), or you will revert to 3+0.5, or more likely, you will fall back onto a standard 6+1 pattern. The possibility of hooking up your naps to the ultradian rhythm without sleep deprivations is a myth. Knowledge of chronobiology or an assistance from a chronobiologist can be of tremendous value here. See also: SleepChart freeware  

Compression of sleep stages

One of the myths of "Uberman sleep schedule" is that it makes it possible to enter REM sleep and skip non-REM sleep stages entirely. That myth is derived from another false claim that implies a non-essential role of deep sleep. I will ignore these claims as standing in total disagreement with laboratory findings and models of sleep. Instead, let us focus on a more plausible claim of the possibility of compressing sleep stages.

It is true that people who are sleep deprived are able to enter deep sleep much faster than normal sleepers. After a period of sleep deprivation, less important stages of sleep are compressed, while the core SWS predominates. Also REM deprivation will result in REM upregulation at recovery time. Indeed, we are more effective at sleeping after we had been sleep deprived. Moreover, it is possible that the homeostatic control of sleep is not very efficient at detecting the true neural sleep need. If you look at our mammal relatives, you may be surprised that a giraffe can do well on 2 hours of sleep, while a bat may need 20. Smart and fast-learning elephants need 4 times less sleep than less brainy felines. Behavioral observations will then quickly lead us to the conclusion that the amount of sleep is not directly correlated with the amount and complexity of memory acquisition and neural computation. 

We may then hypothesize that the sleep control may employ auxiliary physiological parameters that are only loosely related to the requirements of neural optimization. It is also possible, that if the night-time was not very useful as an activity time to early hominids, sleep control mechanisms might have attracted a number of additional physiological functions that might improve survival even if sleep lasted longer than what is needed for memory consolidation and optimization. Hence the possibility of all sleep mechanisms proceeding at leisurely rate with lots of added function that would not require loss of conscious awareness in the first place.

If the above thinking is correct, we might indeed be able to execute the same neural job in a shorter time given the favorable circumstances. However, little is known of the true nature of the link between neural optimization and homeostatic sleep control. Our present knowledge still seems to firmly indicate that you can maximize your creativity to sleep cost ratio only with free running sleep. In other words, there is no evidence that by playing with sleep deprivation, you can increase your creativity. The only possible exception might a tiny degree of deprivation resulting from delaying sleep by 30-60 minutes. Longer delays affect alertness beyond what might be considered a "gain". It is simply possible that between the extremes of free-running sleep and a slightly delayed sleep phase, the trade-off between (1) time gain due to sleep compression and (2) an accelerated homeostatic sleepiness might produce an optimum somewhere in between. Naturally, this tiny prod to a sleep cycle has nothing to do with the employment of alarm clocks, shattered schedule and never-ending battle with grogginess typical to those who experiment with polyphasic sleep. Moreover, even that little hypothetical intervention in the sleep cycle will inevitably result in phase shifts that may have numerous negative side effects, including, most obviously, the inability to function effectively in a society that is largely synchronized with daylight. Well-entrained free-running sleep is still your best bet for maximum cognitive performance.

Sleep and creativity: Less is more

The answer to the question "to sleep or not to sleep polyphasically" will depend on your goals and your chosen criteria. You may want to sleep polyphasically if you want to maximize the frequency of a waking activity (e.g. monitoring the instruments and the horizon in solo yacht racing). Yet you will definitely not want to sleep polyphasically if:

Paradoxically, not are you even likely to choose polyphasic sleep if you want to maximize the time spent in the waking state! Only when approaching substantial sleep deprivation can polyphasic schedule be superior to biphasic schedule in that respect.

Some people like firefighters or emergency surgeons may sacrifice their sleep for the sake of others. Most of the remaining population though will optimize their sleep for best health and best creative performance during the waking time. Polyphasic sleep is definitely not the answer to such optimization goals.

These are not the times of the pyramid of Giza when the genius of a designer had to pair up with a 50,000 drudges reduced to mere back-breaking labor. As we move towards the knowledge economy , it is the alert and creative minds that provide the basis of success in most projects. One minute of insight can be worth a century of shoveling! It might have been a single creative eureka that produced E=mc2. Probably even Einstein himself would not be able to track back the exact moment when his brain produced that formula. Nor would he be able to formulate a sure prescription for others for similar accomplishments. Human creativity is primarily a game of chance. Yet it breeds only on fertile grounds. Top-notch mind in a top-notch shape in conjunction with top-notch sleep is the best formula for more of such insights in the future. Polyphasic sleep is the antithesis of that formula! 

If you scan the blogs of polyphasic experimenters you will see them choose an "engaging activity" again and again just to stay awake. Why would they prefer to meet people or go for a jogging over, for example, getting down to a mentally challenging project? Why would learning a difficult subject be a mental drag? Why would incremental reading have a torturing effect on their minds? As sports or social interactions boost the aminergic activity in the brain, these are effective counterweights to the homeostatic drive to sleep. At the same time, learning is a powerful contributor to the homeostatic sleepiness. Soporific power of learning is one of the most visible connections between sleep and memory. If you have problems with falling asleep, nothing serves as a better natural hypnotic than learning! Not just passive reading. Active learning! The best homeostatic sleeping pill I know is incremental reading. Naturally, you need a circadian component of sleepiness for the "pill" to work. Otherwise, learning (incremental reading) is, paradoxically, your best "creativity pill". It is the circadian phase that determines the positive neural feedback of learning that generates the creative enthusiasm, or the negative neural feedback of drowsiness.

There may more at stake though than just alertness, creativity, and long-term health. It is conceivable, that the sleep control centers in the brain become affected by polyphasic experiments. Researchers have noted cases where shift-work or other forced schedule patterns were able put the body clock out of kilter. Some have speculated that Peter Tripp suffered long-term consequences of his Awakeathon [ref: Tripp]. Polyphasic schedule is, naturally, far less drastic. Dr Stampi has put one Francesco Jost through a diet of 3 hours of sleep for 2 months without measurable adverse effects. Yet, looking at other neuropathophysiological processes, we might worry that it might be possible to actually kill cells in nuclei responsible for the SWS switch, REM on switch, REM off switch, etc. We know that disregarding mental hygiene, depression, excessive cell activity, hypoxia, and other neural stresses can lead to cell loss. As long as this area remains gray, playing with once sleep schedule is tantamount to dicing with once long-term ability to effectively control sleep cycles. This might be not much different from dieting, once you put your appetite control centers out of service, you are sentenced to a lifelong struggle with diets and yo-yoing weight. 

Why less is more? Because by giving your brain as much sleep as it wants, you can be far more creative and productive in your waking time. Not just far more. In a polyphasic sleeper, the creativity may dip by an order of magnitude. Its like with top performance sports. Wrong timing of a dinner may cost Lance Armstrong his yellow jersey. Do not let yourself be marginalized in the race for intellectual excellence! 

Claudio Stampi 

Probably nobody knows more about polyphasic sleep than Dr Claudio Stampi. He dedicated his life to understanding ultradian rhythms and the art of napping. His passion for the idea was born three decades ago when, as a medical student, he was also a passionate solo sailor. He studied sleep in dozens of individuals taking part in competitive sailing. He studied sleep patterns for NASA. He studied polyphasic sleep in laboratory conditions. He strapped his subject with wrist-worn activity monitors and EEG electrodes. He is a worshipper of napping as nothing counteracts sleep deprivation and fatigue better than a nap. In his work, he looks for ways towards improving alertness and survival in life-threatening situations, esp. long-distance boat racing. Yet he is not recommending the polyphasic schedule for normally functioning creative individual who can afford a full night of healthy sleep. His alleged "recommendation" is just one of those myths circulating along with the polyphasic sleep meme. Using polysomnographic tools, Stampi looks for troughs and peaks of alertness. His research tries to capitalize on understanding those ultradian rhythms and maximizing the effectiveness of napping, primarily by optimizing the timing of naps. Today he is the most recognized expert in the field.

Stampi's methods are primarily targeted at minimizing sleep deprivation. He is a biphasic sleeper himself and through his chronobiology expertise can claim proudly "I am never tired" [ref: Stampi]. When speaking about Ellen MacArthur [ref: Ellen] , he puts his research in a nutshell: "What Ellen is doing is finding the best compromise between her need to sleep and her need to be awake all the time". What a creative individual needs is no compromise. It is the uncompromising maximum of alertness, attention, and creative powers.

Stampi has shown that polyphasic sleep can improve cognitive performance in conditions of sleep deprivation as compared with monophasic sleep: Individuals sleeping for 30 minutes every four hours, for a daily total of only 3 hours of sleep, performed better and were more alert, compared to when they had 3 hours of uninterrupted sleep. In other words, under conditions of dramatic sleep reduction, it is more efficient to recharge the sleep "battery" more often. Many use this as the argument for the superiority of polyphasic sleep, while silently skirting around the fact that Stampi also notes that the performance on polyphasic schedule is still far less than that in free running sleep conditions.

Polyphasic geniuses

Rumor has it that there were many geniuses who would sleep polyphasically. The implication is that if it worked for the greatest minds in history, it should also work for a young ambitious student with a voracious appetite to conquer the world. Yet on a closer inspection, those polyphasic stories are very hard to confirm. Somehow, the group does not include contemporary Nobel winners, presidents, or great athletes. In other words, you cannot just e-mail a celebrity and ask. All great polyphasic sleepers are dead. There are still a couple of individuals who boast in their blogs that they are polyphasic sleepers. Very often their sleep is just a stretch of the biphasic sleep definition or a combination of various sleep modes with a heavy dose of sleep deprivation. Some of those cases I cannot explain in any other way than by vested interest or a bloated ego. Even narcolepsy would not explain their napping habits. At any rate, successful polyphasic sleep cases are not in any way verifiable. Naturally, absence of proof is no proof of absence, and this section is not intended to prove that polyphasic sleep is not possible. It is the biological argument above that settles the issue. Here, I am only trying to illustrate the myth-making powers of the Internet.

As for polyphasic geniuses, the list seems to be getting longer along with the snowballing myth of the benefits of a 22 hour waking day. Currently, the list includes da Vinci, Edison, Tesla, Churchill, Benjamin Franklin, Thomas Jefferson, and even Bruce Lee. I would not be surprised if Newton and Aristotle joined soon. Perhaps even Jesus might follow up later.

I tried to find out if there is any record of the sleeping habits of the greatest geniuses in history. All I could find was rather a standard adherence to a normal monophasic or biphasic sleep, with an exception for numerous all-nighters at the time of the creative high. Only the biographers of Buckminster Fuller who I managed to get in touch with seem to confirm that his sleeping habits were quite unusual and that he experimented a lot with various sleeping patterns. In particular, while traveling and lecturing extensively, he would enter what he called a "dog sleep". That sleep, however, had nothing to do with polyphasic sleep. It was a sort of improvised mix of free-running sleep confounded by jet lag, meetings and deadlines. In other words, Bucky would catnap whenever he was tired and had an opportunity. However, if he could squeeze a sound 6 hours here and there, he would not miss the chance. This "dog sleep" did not fit any fixed alarm-clocked schedule. It was just a compromise between circadian rhythms and Bucky's hectic lifestyle.

Although even Stampi anecdotally refers to Leonardo da Vinci , Leonardo's polyphasic sleep is probably an urban myth. I could not locate any credible sources with any notes on his sleep habits, and yet da Vinci is nearly always mentioned whenever the art of napping comes into question. It seems quite strange that someone would come up with a crazy polyphasic schedule idea at the time of leisurely Renaissance life that was well-timed by the superiority of sunlight over candlelight. Allegedly, hinting at a monophasic mindset, he spoke of death: "As a well-spent day brings happy sleep, so a life well used brings happy death". Even more telling is Bandello's report on da Vinci's work over "The Last Supper". Leonardo would work continuously from dawn to dusk forgetting about food and drink. Stunned Bandello would definitely reported the round-the-clock work of a polyphasic sleeper as even more amazing. It seems to me that using a poorly researched historic case from 500 years ago as a prop in favor of polyphasic sleep is rather a dated argumentum ad verecundiam. Incidentally, da Vinci is also a name that crops up on other suspect lists: the lists of great people suffering from attention deficit disorder, or the lists of great vegetarians. The same memetic mechanism must be placing da Vinci, Jesus, Einstein, and Hitler alongside each other in a number of myths over and over again. And did you hear of "Da Vinci Code" or the authorship of the Turin Shroud?

Napoleon is not less frequently referred to in the context of napping or polyphasic sleep than da Vinci. And his case is rather easy to falsify through historical records. When compared with an artistic genius of Leonardo, it seems even more preposterous than a brilliant military commander could possibly retire for a nap during a prolonged battle or during his intense life peppered with plethora of engagements. He is indeed said to have slept little and frequently suffer from insomnia at times of great stress. He was also often interrupted by messengers that might perhaps increase his propensity to napping at daylight. Yet he was to be woken up only with bad news. The hard rule was that the good news could wait. His memoirs indicate that he did not mind dying young. Consequently, he would disregard his doctors on the matter of sleeping little and drinking buckets of strong coffee. As Napoleon's life was jam-packed with stress, his short sleep might have been a consequence of his lifestyle. Low sleep diet did not translate well to Napoleon's military skills. Some contemporaries attribute his errors at Waterloo to sleep deprivation. Yet, during slower days he would sleep for sound seven hours, waking up at 7 and often lazing until 8. Then he would yet add an nap in the afternoon. Records also indicate that at Saint Helena he was a normal sleeper, and while stress was replaced with boredom, he often slept late.

Jefferson and Franklin seem easy to falsify as polyphasic sleepers. In letters to Doctor Vine Utley (1819), Thomas Jefferson writes about his sleep habits. We can conclude that his sleep was not very regular, he would go to sleep at different times (often late into the night), he would always devote at least 30 min. to creative reading before sleep, he would fall asleep later if the reading was of particular interest, and he would regularly wake up at sunrise. In other words, expectedly, there are no traces of polyphasic sleeping in Jefferson's life. Jefferson, da Vinci, Franklin, Einstein, or Edison, are probably the most popular names on all those trumped up lists of famous people affected by X,  practicing Y or believing in Z.

As for Benjamin Franklin , we might conclude that he did not hold sleep in high esteem. This we can conclude from the famous quotations such as "There will be sleeping enough in the grave" or "The sleeping fox catches no poultry". This attitude resembles the one of those who are ready to practise polyphasic sleeping today. It is also a frequent characteristic of high achievers from the times when we knew little of the biological function of sleep. Yet Franklin is even better known for saying:  "Early to bed and early to rise makes a man healthy, wealthy, and wise". From this we might conclude that if he wanted to sleep less, his formula would be to get up early. Not to shred sleep into pieces. Moreover, for a high achiever with little regard for sleep, retiring for a nap might feel like a major sign of laziness or weakness. That stigma lasts until today in western culture, where napping is often considered a habit of lazybones. Last but not least, Franklin as a advocate of DST would say: "It is silly and wasteful that people should live much by candle-light and sleep by sunshine". Polyphasic sleeper definitely he was not.

We know quite a lot about Winston Churchill 's sleeping habits. As a wartime PM, his daily routine was watched closely by his assistants. Churchill could work his ministers to exhaustion by staying up late, but he would also routinely take a solid 1-2 hour nap in the afternoon. As such, he was a classical biphasic sleeper. At his house at Chartwell, his routine was quite regular. He would wake at 8, spend the morning in bed reading papers, dictating letters, etc., take a long nap at tea time, and work till as late as 3 am. He averaged 5-6 hours of sleep per day. Those words are attributed to Churchill himself: "You must sleep sometime between lunch and dinner, and no halfway measures. Take off your clothes and get into bed. That's what I always do. Don't think you will be doing less work because you sleep during the day. That's a foolish notion held by people who have no imaginations. You will be able to accomplish more. You get two days in one -- well, at least one and a half" (source). Churchill's well-drilled biphasic habits made him one of the most energetic wartime leaders. On a humorous note, F. D. Roosevelt's aides noted that after a Churchill's visit, the US president was so exhausted that he needed 10 hours of sleep for 3 days straight to recover.

Thomas Alva Edison had a love-hate relationship with sleep. Sleep researchers blame him for robbing the modern population of 1-2 hours of sleep. Workaholics like to quote him on his contempt for sleep. Advocates of polyphasic sleep claim he was a polyphasic sleeper. Indeed, Edison's contempt for sleep is well documented. Yet it can only be attributed to his ignorance. Little was known about the biological role of sleep at his time. He believed wrongly that, as with food, humans will always sleep more than necessary given a opportunity. As a natural short sleeper, he believed long sleep is a sign of laziness: "Most people overeat 100 percent, and oversleep 100 percent, because they like it. That extra 100 percent makes them unhealthy and inefficient. The person who sleeps eight or ten hours a night is never fully asleep and never fully awake - they have only different degrees of doze through the twenty-four hours". In a parallel flash of ignorance, Edison could not see much value in physical exercise. His winter home featured one of the first modern swimming pools, yet Edison never used it. He just did not share the modern view in which exercise and sleep are considered a good investment in mental and  physical health. His co-workers noted that Edison actually slept far more than he would like to admit. Clearly, he would carry sleeping little as a badge of honor. He catnapped a lot, and his nap cots have been preserved to this day in Edison museums. By no means could I though find any credible evidence that Edison's napping complied to any regiment other than "nap when sleepy", which usually turns out to match a biphasic pattern. The most reliable information I could find about Edison's sleep was his own diary kept only for a short time while approaching the age of forty. From this diary we can learn a lot about his sleeping habits. He seemed rather obsessed with getting a good night sleep as his day would often start with notes on the quality of sleep. The better he slept the happier he seemed. That's quite the opposite of what polyphasic proponents claim. Instead of maximizing waking hours, Edison would rather maximize the hours in which he could use his well refreshed mind. And that's exactly what seems most rational from the point of view of physiology of sleep, mental hygiene, and productivity. 

After a short stint under Edison's umbrella, Nikola Tesla became a bitter rival of his former mentor. We have all heard of the "war of the currents", but Edison and Tesla clashed in another battlefield. They tried to outbid each other in sleeping little. Tesla noted that Edison slept much more than he would want others to believe. That injects a dose of boastful personality to their own reports on how much the great inventors slept. Tesla who could indeed work throughout the night, would often crash for the entire day of sleep after his exploits. He exhibited classic signs of manic creativity, which might have been interrupted by short recuperative naps or long recovery sleep. Otherwise, Tesla was nothing more than a short sleeper. He was too busy with his pursuits to ever think of anything resembling a strict polyphasic schedule. That would be a strait jacket on his flamboyant personality. 

All in all, the whole list of polyphasic geniuses seems to be lacking any credible evidence. As such it is probably a child of collective wishful thinking committed by those who would love to add waking hours to their day. 

Polyphasic sleep for dummies

Some of the biological argument presented in this article may not be entirely suitable and convincing for teenagers, esp. those who slept polyphasically through their biology class. Let's then reword it all in baby language. Experience shows that "for dummies" sections are most popular and most effective in conveying the message. Disclaimer: the models presented below are used for illustration only and are a remote approximation of real processes occurring in sleep 

Alarm clock is bad for you

A metaphor that may help you get some sense of what alarm clocks do to sleep is a comparison of NREM-REM cycles to your PC. During the day, while learning and experiencing new things, you store your new data in RAM memory. During the night, while first in NREM, you write the data down to the hard disk. During REM, which follows NREM in the night, you do the disk defragmentation, i.e. you organize data, sort them, build new connections, etc. Overnight, you repeat the write-and-defragment cycle until all RAM data is neatly written to the disk (for long-term use), and your RAM is clear and ready for a new day of learning. At waking up, you reboot the computer. If you reboot early with the use of an alarm clock, you often leave your disk fragmented. Your data access is slow, and your thinking is confused. Even worse, some of the data may not even get written to the disk. It is as if you have never stored it in RAM in the first place. In conclusion, if you use an alarm clock, you endanger your data. If you do not care about your intellectual performance, you may want to know that there are many biological reasons for which using alarm clocks is basically unhealthy. Those run beyond the scope of this article. Many people use alarm clocks and live. Yet this is not much different from smoking, abusing drugs, or indulging in fat-dripping pork. You may abuse your brain with alcohol for years, and still become president. Many of mankind's achievements required interrupted sleep. Many inventions were produced by sleepy brains. But nothing is able to change the future as much as a brain refreshed with a healthy dose of restful sleep. 

You cannot sleep polyphasically without an alarm clock

Your whole sleep cycle can be explained with the clock and hourglass model. Deep in your brain, your body clock is running on a 24 hours cycle. Every 24 hours, the clock releases a sleepy potion that puts you to sleep. If you try to sleep at wrong hours, without the sleepy potion, you may find it very hard to fall asleep. All insomniacs suffers from the lack of sleepy potion. If they go to sleep too early, before they get their fix of sleepy potion, they will toss and turn. Often for hours. You need to listen to your body clock to know when it is the right moment to go to sleep.

Yet the sleepy potion produced by the body clock is not enough to put you to sleep. The brain also uses the hourglass of mental energy that gives you some time every day that you can devote to intellectual work. When you wake up, the hourglass is full and starts being emptied. With every waking moment, with everything your brain absorbs, with every mental effort, the hourglass is less and less full. Only when the hourglass of mental energy is empty, will you able to quickly fall asleep.

To get a good night sleep, you need to combine two factors:

  • your body clock must be saying "time to sleep"
  • your hourglass of power must be saying "no more mental work"

If your sleepy potion tries to put you to sleep but your hourglass is full, you will be very groggy, tired, but you will not fall asleep. 

If, on the other hand, you try to sleep without the sleepy potion while the hourglass of power is empty, you may succeed, but you will wake up very fast with your hourglass full again. That will make sleeping again nearly impossible.

Insomniacs go to sleep before the body clock releases the sleepy potion. When you wake up early with an alarm clock, you can hardly get to your feet because your body is full of sleepy potion, which begs you to go back to sleep. When you are drowsy in the afternoon, your hourglass of mental power might be almost empty. A quick nap will then help you fill it up again and be very productive in the evening. If you drink coffee in the morning, it helps you charge the hourglass and add some extra mental energy. But coffee combined with the sleepy potion produce a poisonous mix that engulfs your brain in sickly miasma. If you try to drink coffee to stay up in the night, you will feel like a horse kicked you in the stomach. That's the acme of a criminal attack on your brain's health.

Here is why polyphasic sleep will never work naturally:

  • in the morning, if you are fresh and rested, your sleepy potion is cleared and your hourglass is full of mental energy, you are not likely to fall asleep. Trying to take a nap at that time is a waste of time. You will waste time for nap preparations. You will waste time trying to fall asleep
  • in the afternoon, if you hourglass is getting empty, you may be able to take a nap. That's ok. Your nap will be short because the sleepy potion is not there
  • in the evening, your sleepy potion is still not there. If you took an afternoon nap, your hourglass is almost full of energy. If you try to take another nap, you will be staring at the ceiling. You will waste your time again
  • in the night, your sleepy potion is released. Napping should be easy, but if you fall asleep, you will not wake up. Not naturally. You will need an alarm clock. You may manage to recharge your hourglass fast, but the sleepy potion will make you groggy and tired. You may need a double alarm or a loud alarm, or some help from your Mom (if she ever agreed to this polyphasic insanity). You will fight and struggle. You will never wake up naturally. Not while the sleepy potion is in action

If you decide to sleep polyphasically. You will have to use an alarm clock. Otherwise you will not wake up in the night. Once you use the alarm clock, you will be sleep deprived. That will make your hourglass conveniently drained of energy. Empty hourglass will make napping easier indeed. But it is the hourglass that determines your mental powers. With the hourglass empty, you will be nothing more than an empty-headed zombie.

To generate naps at equal intervals, you would have to kill the 24-h circadian component of sleepiness. You would have to kill your body clock, and prevent the release of the sleepy potion. That is not possible. The sleepy potion will be released every 24 hour and make you sleepy; however, much you fight it. The shortest natural night sleep rarely goes beneath 3 hours. Many biphasic sleepers can do well on 4 hours. Yet most adolescents may need 7 or 8 hours of night sleep to function optimally.

In healthy sleep, daytime naps are either impossible or very short. If you track your sleep with SleepChart freeware, you will see it on your own. You will see how naps tend to cluster at night time (which may be midday for you). That's exactly what polyphasic guru Dr Stampi observed with solo sailors. Remember, that for the picture to be true, you should avoid alarm clock, which naturally, is not possible in polyphasic sleep. Yet even on a forced schedule you will see regular patterns of naps being longer and more frequent at nighttime (each time your relax your discipline, oversleep, etc.). The daytime naps will be shorter, esp. at subjective evening hours (which may be midnight for you).

Body clock training has its limits

I hear it again and again that all biological reasoning is of no consequence because the body can always adapt to training and pressure, and that science has not yet studied successful polyphasic sleepers. Here is a reply based on the clock&hourglass model: 

  • body clock is controlled by genes, and we do not know pharmacological factors that could significantly affect body clock period. Polyphasic sleep would require shortening the body clock period six-fold!
  • body clock phase can be shifted with light, activity, melatonin and other factors, but the length of the period in which sleepy potion is released is hard to control. Drugs can reduce the impact of sleepy potion, but this should be avoided, as this affects the sleep stage cycles (i.e. not all your PC data may get written to the hard disk and get defragmented) 
  • the speed with which the hourglass of energy is emptied can be affected by drugs (e.g. caffeine); however, faster hourglass would produce more sleep (instead of less), while slower hourglass would make multiple naps even less possible
  • science have not studied successful polyphasic sleepers because they do not exist (although there are as many claimants to the title as there are UFO spotters)
  • polyphasic sleep in laboratory conditions is possible if the alarm clock is used to interrupt natural sleep. Entrained free-running polyphasic sleep is not possible in healthy individuals

Summary

Healthy body clock runs a 24 hour cycle. This cycle will make you sleepy during the subjective night (which can be midday too). This is why you won't be able to wake up from your nap in your subjective night without an alarm clock. Alarm clocks are unhealthy. They prevent sleep from fulfilling its function. The choice is yours: either (1) sleep polyphasically or (2) sleep naturally and let your brain develop its full intellectual potential.

If someone tells you he is doing naps every four hours, and that the naps last 20 min. and that he wakes up naturally, you can safely fire back: "I have seen Loch Ness monster too". That will bring it home.

Disclaimer: before you offend anyone, be sure you are not dealing with someone who is affected by a sleep disorder. For example, narcoleptics fall asleep many times during a day. But that is a result of a damage to their sleep control system. It is a disease and it badly affects their productivity and their life. Narcoleptics are always sleepy.

Comic relief

One of the theories of the biological basis of humor says that it is generated by the sense of superiority over other individuals. Allegedly, those who are able to detect the ignorance of fellow human beings, reinforce their findings through the sense of joy and well-being. Thus seeing others doing stupid things is fun (as long as, hopefully, nobody gets hurt on the way). Supposedly, the evolutionary mechanism of poking fun at the silly ones helped humans preserve wisdom through generations long before written records were available.

In that context, if you understand the sleep control mechanisms that imply the impossibility of entrainment to polyphasic schedule, you may find studying the blogs of polyphasic sleepers extremely funny. Actually, hilarious. With clues and red flags all over the place, the bloggers keep hitting the brick wall. Luckily, those individuals usually see the light after a few weeks of pain. We should hope that nobody gets hurt in the process, e.g. as a result of driving in a sleep deprived state.

All blogs seem to roughly evolve through similar stages. They are predominantly written by males, usually young and full of youthful optimism. There is a cultish aura around the whole concept. It parallels the work ethic and self-imposed or super-imposed sleep deprivation of Aum, Branch Davidians, OTS, or Peoples Temple. This monastic appeal is accentuated by the fact that the ambitious adopters often run various forms of diets as part of their "reform". There are lots of hopes associated with the "polyphasic experiment". Those usually revolve around being able to do more, and experiencing "increased energy". The hopes are magnified by the fact that many volunteers find it difficult to get refreshing sleep in the first place. Then the struggle begins, peppered with hopeful references to "temporary adaptation phase". It all begins with grogginess, problems with waking up, and oversleeping. Tiredness mounts and the word count analysis shows that "tired" is one of the most often used words in those blogs (along "I" and "nap"). Yet the happy "polynapper" is usually able to survive the initial phase through sheer enthusiasm magnified by the availability of extra time and tripled energy to execute a major change in his life. Then the negative aspects of the experiment start showing up. Those include insurmountable sleepiness, sleeping through an elaborate system of alarms, problems with thermoregulation, negative somatic symptoms, self-blame due to repeated oversleeping, etc. Repeatedly, oversleeping occurs in the subjective night, while problems with napping occur in the subjective day. Yet "polynappers" are slow at noticing that regularity. They are happy they get the extra waking time, and yet, instead of spending it productively, they desperately look for anything to kill time to "just survive the fog". They waste precious time on futile attempts to fall asleep at a wrong time. When things do not work their way, they start experimenting with various variants of the sleep schedule. Those include: more naps, fewer naps, longer naps, shorter naps, "pseudo-naps", rigid schedule or "flexi-naps", etc. As these are usually fruitless, the concept of "core sleep" or "recovery sleep" comes into consideration. Some experimenters decide to "listen to the body". With "core sleep" and some attentiveness to one's own body rhythms, experimenters drift towards variants of biphasic sleep, and may gradually approach a reasonable sleeping schedule. Yet without understanding the basics of two components model of sleep regulation [ref: Borbely], it is very difficult to figure out one's optimum sleep timing. The difficulty is compounded by two factors: 1. conviction that polyphasic sleep model will work, and 2. loss of synchrony in circadian rhythms. As for the latter, well-entrained free-running sleep is relatively easy to understand. However, once strong phase-shifting stimuli are introduced into the system, esp. if applied asynchronously or, worse, with irregular patterns, the whole sleep control system becomes chaotic and is essentially unpredictable. In other words, even a seasoned chronobiologist might find it difficult to interpret the correlation between the timing of sleep blocks and alertness. If the unlucky experimenter does not see the biphasic light, he begins theorizing on the causes of his inability to stick to the schedule. These might be bad foods, bad hormones, lack of self-discipline, skipped naps, extra naps, troubles at work, friends, excess sleep, too much REM, too little REM, etc. The theorists speak as if one could easily guess the "level of histamine", or the duration of "Stage 3 sleep" in a nap (no blood test nor EEG needed). Falling asleep within 3-5 min. should be a breeze in a healthy free-running individual, yet polyphasic sleepers constantly battle with not being able to fall asleep fast enough while in circadian high. Equally hard, they battle with waking up from the nap while in circadian low. No wonder then that oversleeping continues, and the battle with drowsiness takes its toll. In the end, the blogger usually postpones the experiment to "better times" (after Christmas, after vacation, after the crazy period, etc.). Sometimes the blog just ends abruptly without a conclusion. Rarely does the "polynapper" admit defeat, or concludes on the infeasibility of polyphasic sleep. Few, disingenuously, claim the successful adaptation to the sleeping schedule and go on to blogging on other subjects.

Why don't we hear much of polyphasic women? Their sleep physiology is not much different from male sleep physiology. The answer lies in the links between hormones and personality. The same testosterone-derived characteristics that drive man to leadership, war, or dreams of super-human accomplishment underlie the polyphasic death wish. Those young men tend to be hungry for life, hungry for experience, hungry for accomplishment, unable to adapt to 10 pm - 5 am sleeping schedule, rebellious and ready to seek new ways towards maximum productivity. These are mostly noble characteristics. But in a mix with ignorance, they can lead to bad health, poor decision making, poor mental performance, and social frictions. These personality types are also at a higher risk of dying young. And polyphasic sleep may also have its contribution ("I have just driven polyphasically all the way from Canada"). There is only one major benefit of polyphasic sleep: polyphasic bloggers contribute to our understanding of sleep. No researcher could ethically subject that many individuals to the mental torture of polyphasic schedule.  

Below I compiled a list of funniest quotes from polyphasic blogs. Those illustrate the phases of the experiment with the special focus on oversleeping and alertness. Naturally, the list is very selective and out of context. Bloggers often claim they feel great, the method works, and they plan to continue indefinitely. Yet interwoven with the enthusiasm are red flags that amazingly keep passing unnoticed. A few blogs even scream great success. I won't quote or link to these as I found them quite disingenuous, and transparently carrying a hidden agenda. These would dilute the truth and hype a potentially hazardous habits. If you care, you can easily find these on your own. 

While reading, keep in mind the ever-mutating list of myths surrounding the polyphasic sleep schedule:

Cream of the crop
Excerpts from polyphasic sleep blogs

Disclaimer: This section is added for humorous effect only. It proves little about polyphasic sleep. If you seek evidence for or against polyphasic sleep, read To sleep or not to sleep polyphasically or at least: Polyphasic sleep for dummies.

Hopes

  • I’ll be more productive. I’ll have more time for my personal work. I’ll become more creative. Coding will become easier
    I’ll be more energetic. My everyday schedule will be more planned, and I won’t miss many events
  • Expecting: A very positive effect on energy, metabolism, dietary cravings, mental acuity, and feeling of peace
  • I think that I would rather live a shorter and more productive life than a long and fruitless one
  • I will never quit. No core sleep
  • Goals for 2006: become FULLY polyphasic. Make a million dollars by my birthday

Oversleeping

  • Last night was a bit hard in the 2-6AM range. I ended up taking an extra nap
  • I had lots of trouble waking up from my core sleep period which is now even 1.5 or 3 hrs depending on how I feel
  • Yep. It was rough. And I overslept badly. I slept in fits, because obviously I kept trying to prevent the oversleeping. 
    So... 8 hours = bad news
  • I'm not sleeping in my bed anymore. I overslept my 4:00 nap by four hours. There. You happy? I said it. [...] I sleep on the couch now, which helps a little
  • I took my first "90-minute nap" when I got home from work, which turned into a 2h 15m nap. Oops. Oh well, it was close, eh? Then I went to sleep a few hours later, for my "3 hour core sleep." THAT wound up being 4.5 hours long
  • I've been having a bad run recently [...] I've had to skip some naps, which in turn led to oversleeping at night
  • I had a four-hour oversleep this morning, but I don't think it was too damaging
  • I’m not sure if I slept through the alarm or if I shut it off and fell back asleep. I’m going to put a new battery in it today and move it further away from my bed. I’m so close to adjusting, I just need to keep these minor screw-ups in check
  • I felt very tired after getting up at 04:25, so I thought I’d go for another 90 min at 05:00. Instead, I blissfully passed out for 6 hours
  • I was in danger of becoming monophasic again [...] but I managed to get a handle on it
  • Yesterday's naps went wonderfully, and I missed no more than two [...]. Things were going great until around 2:45 this morning, when I failed to wake up from my 2am nap. Oops
  • I’ve been experimenting with having 1.5 and 3 hours of core sleep at different times, and mostly failed by oversleeping. MASSIVE oversleeping So for now, I decided to return to my “flexi naps” method
  • I overslept. By 4 hours. I didn't want to or consciously choose to. I don't even remember turning my alarm off - it's like it never went off at all. But it's set right - so somehow I woke up, turned it off, reset it, and went back to sleep. Dag nabbit
  • Despite my best efforts last night, I fell asleep in my chair at around 03:00. At some point, I must have rolled out of the chair and onto the bed, as that's where I woke up at 07:00
  • I try very hard to stick to the schedule, [...] usually the 11:00 nap became a nightmare. Tonight, [...] I slept five hours during this nap. Mhm ... something is happening. Maybe I became sleepwalker, I developed an algorithm that would allow me to switch off my mobile alarm clock just if I am really awake
  • I kept nodding off in my room because it was dark as my roommate Phil is enjoying his crappy monophasic sleep
  • I’m a bit pissed at myself. I went to bed at 12:30 for my nap. Alarm went off at 1. [...] I was a little tired and decided to “just lay down for a few minutes”. Big mistake. I drifted off to sleep again and didn’t wake up until 3:30, feeling even more tired… So I said screw it and slept till 6:30
  • At 4:35am, my radio alarm clock begins to buzz [...] if it lasts long enough, it will probably wake up my mother, who sleeps directly upstairs. Most often, I end up hitting the snooze indefinitely
  • On Friday, I ate some fish that was probably not that good. [...] I slept 12 hours per night the next 2 days
  • I had an alarm set for 1:30 AM set and placed the alarm all the way across the room. I don't even remember turning it off but I just woke up at 10 AM and realized I had slept for 9 hours, missing my 5 AM and 9 AM naps
  • I can’t believe I spent half of today sleeping. I think the reason was the tiring day at school, and the fact that I didn’t get much sleep yesterday - but I still could’ve used the time on something more productive rather than snoozing
  • I hear the alarm clock, I wake up, stand up, open the drawer, switch off the clock with the right button, so that it doesn't ring again, put the mobile inside that drawer, go back to sleep without even noticing nor remembering
  • By the time I got home I felt like utter crap. I was so dead-tired I couldn’t stand it. Laid down [...] and couldn’t sleep for what seemed the longest time. Around 9pm I finally drifted off, I set no alarm, I was feeling too ill. Woke up this morning (10 hours sleep) and felt great

Alertness and creativity

  • During the last few days it has required some extra willpower to stay awake
  • At about 4am I started to get very tired again - some additional brief naps didn't seem to help much either - the tiredness continued until 7:30 or so
  • I wake up from my 4:00 am nap. [...] I'm really not sure it did anything at all, because I'm twice as drowsy now as I was before I lied down. This is when things really start to get fuzzy
  • The hardest part for me was around 11:30pm. Struggled to keep my eyes open, so I walked around a bit, made tea, etc. 
  • This morning was a bit tough, but I'm holding up quite well now. Although my wife is complaining about me making clumsy mistakes
  • My brain really, really wants me to sleep 9 hours a day, apparently. Well, screw you, brain. I'm gonna stay up and schedule my next 90 minute nap - yes that's 90 minutes, I said, brain, did you hear?
  • I was a bit disoriented at the end of the 5am nap, and nearly accidentally fell asleep when I sat down on the bed for a minute or two
  • Finished a nap recently. I'm starting to really struggle to stay awake. What worries me is that it's still quite early. 
    Wife wants me to watch a movie.... dunno if I can last through a movie
  • Suggestion: Definitely find something engrossing to do. Otherwise you'll struggle. Reading and TV watching isn't a lot of help. Do something creative and constructive. Preferably away from the PC
  • [today's blog post] was a bit... disturbing. I don't even recall making it. [...] I'm under the impression that I didn't sleep through this time, but don't recall what I did
  • Watching 24 Season 3 has really helped me pull through the 2-6AM phase. The only problem is that I don’t want to watch more than 2 episodes at a time or I will finish them too quickly. That leaves me with about 2 hours to find something else to do
  • Last night was a little rough on all of us. Nothing exciting happened, we were just REALLY DAMN TIRED
  • Work was a breeze in the morning, but it was a pretty tough drag through the afternoon. Usually when exhausted, it’s my debugging ability that suffers most, so, to cope, I only worked on small tasks that required basic fact checking, or trivial programming tasks that would not require much, if any, debugging. Got through it. Barely
  • I think the key to this sleep schedule is human interaction. Whether it is chatting with people back home or having someone in the office with me [...], any bit of human interaction will keep me up. If I just sit at my desk though, sometimes nothing will help
  • For a few hours I felt very tired and several times found myself sliding into sleep (and off the office chair at work) for a second or two
  • I'm still pretty exhausted. I almost just fell asleep in the bath
  • I don't remember what exactly I did to keep myself awake. I do remember wandering around the basement in a zombie-like stupor, contemplating what I could do to pry my eyes open. [...] At one point, I was very close to falling over; that's when I decided I'd just take the pseudo-nap a bit early
  • I woke up 90 minutes later to some strange beeping noise... I was delirious as hell. My flailing hands finally found the snooze button [...] I snoozed 6 more minutes. I woke back up just as delirious -- I didn't know where I was or that I wasn't dreaming anymore. And again through sheer willpower, I got out of bed
  • I was so tired that I couldn't even watch a movie. I almost fell asleep in the movie a couple times. For those of you that know me, they will understand how tired I was. I don't fall asleep in movies
  • I decided that from now on, past 1, I am not allowed to lie in bed and watch a movie. It simply doesn't work, I'll just end up falling asleep. Starting at 1:00 AM I'll now only do things that will be sure to keep me awake
  • I laid in bed for 23 minutes with my eyes fluttering, fighting going back to sleep. Every fiber in my being yet again said to go back to sleep [...]. Grogginess level is a 7 out of 10 and very slowly improving. My eyes feel like tiny little beads that are just barely there. This acclimation phase is HARD! But here I am, up and going, and it's 3:30 in the morning. I'm going to go to the gym in a bit. Maybe that will wake me up

"Theories" (warning for skimming readers who are out of context: those "theories" have nothing to do with science!)

  • If our soldiers can get by with 2-3 hours sleep in battle conditions then shouldn't I be able to do it in a less stressful environment?
  • If you can’t get yourself out of bed when your alarm goes off, this is likely due to a lack of self-discipline. If you have enough self-discipline, you’ll get out of bed no matter what. [...] if your self-discipline has atrophied, it can seem an almost insurmountable hurdle
  • The only real down period is after lunch (around 13:00-15:00) were I feel a bit wasted. [...] It’s right after lunch and the body simply uses more energy to digest the food
  • I suspect the drowsiness may be related to the fact that I’ve been more sedentary at night
  • If I live to be 80 years old, which isn’t that unreasonable a possibility, and can maintain this wake/sleep schedule, I will have added 11 years of awake time [...]. And this is with no sacrifice in energy or sanity
  • Polyphasic sleeping increases the # of REM cycles, compressing 9 hours of conventional sleep into 2-3 hours and rejuvenates the brain
  • I think waking up at the same time is crucial. Its much harder to wake up after 3hrs than after a 30 minute nap
  • After slipping in an extra nap, I still managed to screw up and had an unplanned hours nap. Dammit. My wife reckons it was eating too much KFC
  • If you sleep longer than about 20 minutes, you’ll pass out of REM and into other (deeper) phases of sleep
  • It would seem that polyphasic sleep can be successfully implemented and maintained to increase awareness and mental capacity while avoiding the potential lifespan shortening risks of oversleeping
  • I found that it was easier to remember my dreams on a polyphasic schedule, which I attribute to the frequency increase in sleep to wake transitions. With more opportunity to experience my dreams in a semi-wakeful state, I had more opportunities to remember those dreams. I consider this a great benefit since I always enjoy my dreams
  • Man, I'm struggling so badly today... I really pissed my body off. Must have been the popcorn, because I can't think of any other reason for this
  • In my case, it would seem that only a very small amount went into the sleep bank, and the REM sleep that I notched up in my subsequent naps yesterday only covered me until 4am
  • I'm having a hard time actually falling asleep during these naps. Sometimes it can take me as long as 20 minutes to actually fall into slumber, thereby resulting in only 10 minutes of actual sleep. I need to somehow determine some new methods of falling asleep faster
  • Beside the Christmas dinner I cannot see any reasons for the sudden increase of tiredness and the effect of the meat intake also matches what I read
  • I do not recall any dreams from naps in which I was so tired that my brain launched directly into the paralysis inducing state of NREM-4 sleep
  • I feel very encouraged by reading scientific articles that supports the possibility of sleeping less. I believe it’s possible to sleep far less than most people do
  • I'm really tired right now, having a little trouble keeping up the motivation to type. Man, and its only going to get worse from here. [...] I'm going to go watch some TV and then do two sleeps of 2 hours each. I figure I'll never train right if I give myself the full 4 hours, thus interrupted sleep will still train me while giving me extra sleep
  • I usually experience slight signs of psychosis, lots of hallucination, delirium, and other side effects that people usually pay good money for. But during this time, I am 10 times more productive and creative than I would ever be with normal sleeping patterns
  • I've decided that, to alleviate drowsiness further, I'm going to go on a juice diet during the adaptation period. [...] Juice, juice, and more juice. No milk, no soup, and no "fruit drinks"
  • I guess my body needed [extra sleep] to recover from the workout. And I think I don’t mind throwing in a full night of rest once in a while
  • I didn't experience much that was particularly improved, such as memory function. This is most likely because I'm still not fully comfortable with the schedule yet
  • Sleep deprivation came in the form of brief feelings of approaching hypothermia (hot flashes) followed immediately by hyperthermia (cold flashes), similar to the feeling of being sick. When my naps fell short and I was forced to awaken from the deepest stage of NREM, it was quite apparent that my brain was not immediately producing the neurotransmitters histamine or serotonin
  • The cold feeling still remains. I still feel colder than before changing my sleep. I’m hoping this will go away after adjustment has been completed
  • I’ve been spending more time in an alpha state than in a “normal” beta consciousness state [...]. It could help to explain Leonardo da Vinci’s amazing creativity
  • I still have issues with my 01:00-05:00 naps. More often than not, they do nothing for me – I wake up with red eyes. I suspect it has something to do with the fact that I spend too much time with my laptop
  • I've heard that most people who follow/followed an Uberman-style sleep pattern would occasionally reboot with a long sleep
  • It is best to awaken from REM rather than NREM, especially NREM 4, lest a sleeper risk jarring the brain into a state for which it is unprepared
  • NASA says that 24 minutes is the optimal nap time
  • The secret [to sleeping little] is [...] a multiple of 90 minutes [...]. Those are the sleep quantities that you should aim to get [...]. Guaranteed. Go to sleep without an alarm clock, and watch what times you naturally wake up at. It will be a multiple of 90 minutes [...]. This 90 minutes is known as a sleep cycle, and it's how I live my life.[...] the more rested people are actually getting closer to 7.5, or 9 hours, while the 8 hour folk feel constantly unrested
  • My method [of falling asleep fast] is a combination of hypnosis, meditation, and directed thought. [...] When you nap for 25 minutes at a time you can’t afford 10-30 min to fall asleep. [...] I always sleep on my back. [...] Picture a white light at the top of your head and slowly working its way down your body. As it touches a muscle that muscle relaxes. [...] Breathing is important. This is taken from meditation. Use long, slow, deep breaths. [...] At this point start thinking about and visualizing something that would make a relaxing dream. [...] Visualization is key here. Dreams are extremely visual. [..] I can look around the visualization by moving my eyes, just like REM sleep

Doubts, questions and enlightenment

  • I've ruled out simple sleep deprivation, because the drowsiness only comes at night, regardless of how effective the naps are or whether I oversleep. But when that drowsiness does hit, it hits like a ton of bricks
  • I’m finding it difficult to force myself to take naps. This is causing me to sleep for fairly long periods of time at night which sort of goes against the whole point of this experiment
  • My sleep has been extremely light. It isn’t unusual for me to wake up 5-10 times per nap.
  • I woke up tonight at 05:00, I thought that the method was going nowhere [...] I did not fully achieved my purpose of gaining five more hours a day
  • Polyphasic sleeping is not the most girlfriend-compatible stunt [...] I often want to spend a full night with her, but then worry about the effects of oversleeping
  • What my body has been forcing me [...] through over sleeping seems to be about 30/30/30/30/30/120. Maybe I should just listen to my body and do that intentionally?
  • I could keep trying, but it's beginning to put really serious stress on my relationship with my girlfriend. I know the goal of this was to have more free time, but living by myself again may be a bit more than I was planning
  • It's pretty tough making it through the night, and alarms are essential. Rarely am I waking up naturally during a short nap. Whilst this isn't so bad when I'm at home (although I do often think "why am I bothering?" when I'm forcing myself to stay awake), it is particularly uncomfortable when driving [...] as I have to keep stopping for fear of my own safety. Daytimes are usually fine though
  • It can be a little inconvenient having to stop to take naps all the time. This becomes less important when on the full Uberman schedule as it is overshadowed by the free time advantage, but if the total daily sleep time goes above about 4-4.5 hours then [...] you might as well take that sleep monophasically and not have to constantly lame out all the time to take a nap
  • What would [polyphasic sleep] do to the Immune System? It seems like the risks of Polyphasic sleeping exceed the rewards
  • It takes me at least 30 minutes to fall asleep. That means to do Polyphasic sleeping, I may have to devote at least an hour for each nap which translates to six hours per 24 hour period. This isn't too different from a regular 7 or 8 hours of conventional monophasic sleep

The End

  • I've got a bad cold, and I've been scarfing down Benadryl all day. I slept in fits all day long, since I thought that was what would be best for my body to recover
  • On the 10th day, I went to bed at midnight, had a nap, and then wheels came off. This last weekend of social activities every day simply rocked the boat far too much. [...] I'll be restarting, and since I'm used to it, I'll move into a strict Uberman schedule. I'll arrange with my boss to have a nap at 11am and 3pm, under condition I skip lunch and come in on time 
  • After about 100 days of living a polyphasic lifestyle, I decided to quit. While I did find that it was a useful tool to get extra waking hours in the day, it was too much of an effort
  • I've decided to put off the polyphasic sleeping experiment, for now. There are a number of reasons for this, but it really all comes down to my life being a bit too crazy right now
  • I've decided to postpone Polyphasic sleeping indefinitely because I question the long term impact it will have on one's health
  • So as of last night I'm no longer polyphasic, which basically means I slept for nearly seven hours [...] I've decided to take a week off, but I will definitely be doing this again soon
  • I've been thinking whether it's actually worth continuing with this. I mean, I never intended to do it forever, and it's now been three months and I'm still not fully into it. Will I ever be?
  • I definitely want to continue with polyphasic sleeping, because the pros far outweigh the cons, assuming I can figure out how to get into it properly
  • I've decided to postpone Polyphasic sleeping because it is impractical. The process of getting into bed, and waking up every 3.5 hours feels like compressing 6 day/nights into a single 24 hour period. It feels like too much work

Finally, a blog quote that falls out of the comedic category: 

About 9AM, the wall started coming up. I got a bit lethargic, so I just kinda sat around. But I wasn't lethargic enough that I wasn't functioning. [...]. I'm an air traffic controller, and I had no problems working the jets. I found myself LONGING and YEARNING for that afternoon nap! I was daydreaming about it 

Even though it is not nice to poke fun at anyone, I hope I do it for the right cause. After all, ignorance and mental flops happen to everyone, incl. the greatest geniuses of history. Those young man show many characteristics that will make them successful in life: perseverance, curiosity, willingness to experiment through pain, voracious attitude, zeal for action and change, etc. Many of those quoted bloggers will go on to do great things in life. Naturally, I do not believe that will happen on a polyphasic sleep schedule. 

Conclusion

  1. Healthy humans cannot entrain polyphasic sleep without a degree of sleep deprivation. It is not possible to sleep polyphasically and retain one's maximum creativity, alertness, and health in the long run
  2. Whoever claims to be on a perpetual polyphasic schedule must be either suffering from a sleep disorder, or be a liar, a mutant, or a person with a mulishly stubborn iron-will that lets him plod through the daily torture of sleep deprivation
  3. All the hype surrounding polyphasic sleep can be delegated to the same lunatic basket as miracle diets, scientology, homeopathy, water magnetizers, creation "science", electrolytic detoxifiers, or Sylvia Browne. If you are interested in any of these, visit the most entertaining site on the web run by the indefatigable guru James "The Amazing" Randi
  4. If you do not believe the arguments presented in this article, or if you think the author is biased, ignorant or driven by a hidden agenda, please read the follow-up. If you still plan your own polyphasic experiment despite its harmful effects on health and your mental performance, please contact me. I may suggest how you can now effectively measure the impact of polyphasic sleep on your brain.
  5. If you want to maximize the time spent in productive wakefulness, read about free running sleep. Let your biology work for you, not against you

References

Circadian cycle and the PRC

Molecular and neural basis of circadian rhythms

Claudio Stampi

Sleep deprivation 

Shift work

Further reading at supermemo.com

  1. Polyphasic Sleep: 5 Years Later!
  2. Good sleep, good learning, good life
  3. SleepChart: Formula for healthy sleep
  4. Poor sleep = poor learning
  5. Polyphasic sleep FAQ
  6. Sleep FAQ
  7. Genius and creativity (incl. sleep, Edison, Tesla and more)