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Most of the questions below refer to the article: Polyphasic Sleep: Facts and Myths, and to its followup: Polyphasic Sleep: 5 years later
- Polyphasic sleep will not improve your cognitive performance
- The best way to minimize time spent sleeping is to free run your sleep
- Taking more than one nap per day quarrels with productivity goals
- Adults cannot emulate baby sleeping habits
- You cannot improve your mental output by sleeping less
- Your family doctor will not instantly spot the damage resulting from polyphasic sleep
- Polyphasic sleep looks different before you begin your trial
- It is a myth that polyphasic sleep gives you more REM sleep
- Caffeine levels won't affect instability of polyphasic sleep pattern
- Your polyphasic sleep experiment is doomed to fail
- Vegan diet will not significantly change your sleeping habits
- Polyphasic Sleep article is biased
- Chronobiologists cannot be neutral towards polyphasic sleep as a lifestyle
- Triphasic sleep
- Polyphasic sleep: Constructive Criticism
- Polyphasic sleep for a 15-year-old boy
- A degree of adaptation occurs on a polyphasic sleep schedule
- Twenty years after Dr Stampi's book, we now more about sleep
- 3 naps schedule
Polyphasic sleep will not improve your cognitive performance
(anonymous, Jul 19, 2002)
Question:
I read about polyphasic sleep. Apparently it is excruciatingly hard to get it started, but once people did, they got higher average scores on cognition and recall tests. It makes sense. It's how animals sleep. Just watch a cat or dog. It's how babies sleep. I heard it is how Buckminster Fuller slept
Answer:
False! You read only one thing right: polyphasic sleep is excruciatingly hard. It is not only painful to start. It is even more painful to sustain when your hopes of gaining a few extra hours per day lay down in ruins as you keep on your struggle with the natural sleep mechanism. Buck Fuller, Edison, Tesla and others might have had very strange sleep habits, but they certainly did not go far against their natural sleep needs. If they tried, we might still be a few years back with industrial development. You cannot follow animal sleep. Each animal has its own sleep pattern. You do not want to follow a nocturnal rat. Nor will you be able to sleep with one hemisphere on like a dolphin. Or sleep in a standing position or in flight (like some birds). The oscillator changes also as we age, hence we convert from polyphasic babies, to biphasic or nearly monophasic adults. Laboratory experiments consistently indicate that normal humans are unable to consistently sustain polyphasic sleep. What is worse, their cognitive performance in polyphasic sleep experiments is not better. It is dismal. Dr Claudio Stampi, who studies polyphasic sleep regimes, recommends polyphasic sleep for those who need to maximize alertness for a set condition of sleep deprivation (e.g. as in solo sailing). This cannot be confused with maximizing alertness overall. The formula for maximum overall alertness is: free running sleep. Most people are biphasic or even monophasic when they free run their sleep. Anything against the free running rhythm is bound to result in mental torture and cognitive deficit
The best way to minimize time spent sleeping is to
free run your sleep
(Virgil, Monday, June 24, 2002
8:58 AM)
Question:
I've come across many evangelists for the
polyphasic sleeping schedule (Uberman
sleep schedule) as adopted by Edison, Da Vinci, etc. I've
seen various modifications of both of their sleeping
schedules:
- Da Vinci method, briefly, required the person to operate on a 4-hour basis. At the end of every 4-hour wake phase, the person sleeps for 15-30 minutes
- The modified version is called CyberSleep. The person sleeps between a half-hour to one-hour. The method also requires an extended sleep of 2 hours during the early morning period
- Minors and Waterhouse (1981) proposed a method based on an 8-hour total sleep time. The anchor methods requires sleep to be "anchored" to an unvarying 4-hours of sleep every night at the same time, but allows the remaining 4-hours to be taken at any other time during the day, as the person desires. The "flexible" 4-hour portion must be used as a whole and not fragmented into component naps.
Are these sort of esoteric and unconventional sleeping
schedules good ideas to emulate or not? I would love to cut down on the
amount I sleep
Answer:
Polyphasic sleep
is "recommended" only to those who want to contribute to the
understanding of
sleep at the cost of their health and intellectual performance.
All forms of sleep enforced with an alarm clock will increase your
overall demand for sleep.
This means that: if you use an alarm clock, either (1) you
will sleep longer or
(2) you will feel more miserable. Artificial sleep schedules
will dramatically reduce your mental capacity. A healthy individual in
normal conditions will find it difficult to fall asleep
4 hours after the main sleep episode unless that episode was
unnaturally cut with an alarm clock resulting in sleep deprivation.
Polyphasic schedules are very appealing in
theory, and many people try them out just to give up within a week or a
month
(depending on the ability to suffer through the mental misery). Those
who try to adjust to any unnatural schedule will suffer
an unspeakable torment of the mind. Polyphasic sleepers regulate their
sleep with an alarm
clock until they reach the breaking point. Human self-experimenting
guinea pigs collapse into a sound life-saving 5-8 hour sleep towards
the
breaking point and then resume the polyphasic schedule with a sense of
guilt.
That sense of guilt is calmed with exculpatory terminology such as
"weekend
break", "re-energizer", "bonus sleep", etc.
Polyphasic experimenters may happen to sleep less but their
intellectual performance will be dramatically undercut.
Some polyphasic sleep theories are based on the false premise that the
body can adapt to any sleeping rhythm.
Other researchers try to find a natural polyphasic rhythm that would
minimize
the pain of sleeping little. Scientists have studied the so-called
phase response curve of the circadian rhythm, where the impact of
various sleep affecting factors is shown to move the sleeping schedule
forward or backward. The obvious conclusion is that we can rather
painlessly move the major circadian low little by little in a desired
direction. However, a healthy
normal individual will not be able to chop the rhythm into a desired
number of pieces. Monophasic sleep or biphasic sleep are the norm in
healthy individuals. Biphasic sleep is rarely composed of two major
sleep episodes. Usually it has a form of a major episode (nocturnal
sleep) and a minor episode (siesta). What great inventors might have
experienced is
an irregular sleeping schedule in conditions of hypomanic excitement.
In such conditions, sleep may become fragmented, but it will still not
submit to
a designer schedule. Great catnappers nap when they feel they need to.
Often, they can accurately predict when and how much they will need to
nap. If you want to minimize time spent sleeping and maximize your
learning results: free run your sleep.
Get rid of the alarm clock!
It is a myth that polyphasic sleep gives you more REM
sleep
(Hermann Klinke, Feb 03, 2006,
16:17:52)
Question:
I think that you are mostly right with what you wrote in the article on
polyphasic
sleep. But there is one thing that you misunderstand: Ubermen
try to eliminate all sleep phases but the REM phase, because that is
the most important
phase.
Answer:
As there is no "Uberman science", one can only address a collective
view of polyphasic bloggers, which is a mix of rumor, pseudo-science
and
misunderstood science. It is true that some bloggers claim that the
goal of
polyphasic sleep is to get REM-only sleep. As this goal is entirely
implausible, the article addresses a more plausible variant in which
the sleeper
attempts to compress sleep stages through sleep deprivation and
consequently
gain waking time. The roots of the REM-only misunderstanding can
probably be
tracked back to old sleep models that have been rubber-stamped by
mainstream
sleep research.
Historically, the importance of REM sleep for memory and learning was
documented before we became truly aware of the role of slow-wave sleep.
Consequently,
articles and books on sleep are peppered with an overemphasis on the
role of REM
sleep in learning as compared with SWS. Over time, REM deprivation
studies received lots of criticism. Today, we
know that the natural harmonious interplay of uninterrupted NREM and
REM sleep is essential
for memory, learning and creativity.
Cruel sleep deprivation studies actually show that sleep deprived rats can live longer if REM deprived than if NREM deprived. Similarly, napping human subjects reported that it is Stage 4 NREM that feels most restorative.
In sleep deprivation induced by polyphasic schedules, REM sleep will occur faster due to sleep stage compression. Yet it is the slow-wave sleep that is the primary target of homeostatic upregulation strongly determined by the duration of prior waking. As REM sleep is far more associated with the circadian phase, its proportion in sleep will actually drop, esp. in naps initiated in the subjective evening period. You may want to study sleep models by Alexander A. Borbly and Peter Achermann, which nicely explain the mechanics of these processes. Laboratory findings seem to indicate that the drop in REM gradually recovers towards the baseline over successive days of sleep deprivation, but the reversal is never complete. In other words, you will get less REM sleep on a polyphasic schedule as compared with a free running schedule. This REM sleep diet is as much absolute (as measured in minutes) as it is relative (when compared with Stage 4 NREM). Getting more REM in polyphasic sleep is a widespread myth.
The problem of REM deprivation becomes more pronounced if you use an alarm clock when waking up from naps. By using the alarm clock, you statistically hit REM sleep more often as its proportion always increases over sleep time. This is why polyphasic sleepers often remember their dreams on awakening. That's not a sign you get more REM. It's a sign you are destroying your REM sleep. By using very short blocks of sleep, you affect REM even further by a strong homeostatic upregulation of Stage 4 NREM that displaces whatever REM you can get.
You probably know that alarm clocks are bad for sleep and for health in general. They also interrupt the natural memory consolidation and optimization cycles of sleep. This is explained in non-biological language in: Polyphasic sleep for dummies.
If you (1) do not fight sleepiness and (2) wake up from your naps naturally, the problem of sleep disruption does not occur. However, it is impossible to regularly fit a pre-planned polyphasic schedule without some help from alarm clocks. This comes from the fact that the only stable sleep patterns in healthy individuals are mono- or biphasic. Polyphasic sleep patterns may be stable and sustainable in various cases of hypersomnia. When the sleep control system is disrupted and the homeostatic sleep component works in overdrive, frequent napping may occur and be recommended (e.g. narcolepsy, infection, medication, etc.). Also a degree of sleep block fragmentation may also occur as a result of stress, social life, excitement, staying up late, etc. Those disturbances may occasionally allow for days with more than one nap occurring naturally. If you give up the alarm clock, you take away the major culprit that makes polyphasic sleep unhealthy. However, without an alarm clock, it is your body that will decide the sleep schedule, not your pre-planned "rationalized" schedule graph.
If your goals is to get many naps with lots of REM, you might want to know that more than two naps with solid REM sleep are diagnostic for narcolepsy - a disorder that can turn the life of sufferers into a misery.
Some reading on the subject of the link between sleep stages and learning:
- Articles by Robert Stickgold, on the importance of all stages of sleep, should be studied at primary levels to ensure no kid ever contemplates experimenting with his (girls are more sensible here) sleep patterns. Here is a recent one from Nature available on-line: http://www.nature.com/nature/journal/v437/n7063/full/nature04286.html
- For more on the role of NREM in memory see: Campbell, I.G., Guinan, M.J., and Horowitz, J.M.. Sleep deprivation impairs long-term potentiation in rat hippocampal slices. J. Neurophysiol. 88, 1073–1076 (2002): http://jn.physiology.org/cgi/content/full/88/2/1073
- And a scary reading for sleep
deprived Ubermen: Guzman-Marin, R., Suntsova, N., Stewart, D.R., Gong,
H., Szymusiak, R., and McGinty, D. Sleep deprivation reduces
proliferation of cells in the dentate gyrus of the hippocampus in rats.
J. Physiol. 549, 563–571 (2003):
http://jp.physoc.org/cgi/content/full/549/2/563
It's a pity that polyphasic sleepers, instead of studying the subject, prefer to dig "wisdom" from fellow bloggers and engage in a stultifying game of gossip that does not advance our understanding of sleep hygiene
Adults cannot emulate baby sleeping habits
(Alex Gordia, Feb 05, 2006)
Question:
Why all this rant against polyphasic sleep? Don't babies sleep
polyphasically? There is even a saying about good sleep:
"to sleep like a baby"
Answer:
First of all, babies sleep for far many more hours than the
alleged polyphasic sleepers (say, 16 hours instead of 3). Secondly, the
polyphasic sleep pattern is lost gradually as soon as in the first year
of life. Try as you might, you cannot possibly keep sleeping
polyphasically, nor for 16 hours, unless you are seriously sleep
deprived.
Thirdly, babies do not use alarm clocks to shred their sleep to pieces.
Last but not least, polyphasic sleepers (despite a widely circulated
myth), lose REM sleep in the first order. Babies, on the other hand,
may get as much as 60% REM, without which their cerebral cortex would
not even develop correctly (as evidenced in sleep deprived kittens).
The origin of the rant comes from the potential damage that may result
from further dissemination of the myths surrounding polyphasic sleep
Caffeine levels won't affect instability of
polyphasic sleep pattern
(Aigars Mahinovs, Feb 06, 2006,
11:21:01)
Question:
Could avoiding caffeine beverages help in adaptation to polyphasic
sleep?
Answer:
Because of a relatively slow elimination of caffeine and its impact on
adenosine
receptors canceling homeostatic sleepiness, ingesting caffeine later
than 5-7
hours before a nap will make taking a nap more difficult (except cases
when
ingestion takes place directly before a nap).
It is true then that avoiding caffeine shall make taking multiple naps somewhat easier. Yet it won't remedy the problem of grogginess when waking up in subjective night. The problem with polyphasic sleep is the asymmetry of the circadian cycle (which is only marginally affected by caffeine), and a slow build up of homeostatic sleepiness. Even complete abstention from caffeine will not generate sufficient homeostatic sleepiness without a degree of sleep deprivation. Reversely, taking drugs that would activate adenosine receptors would result in sleep patterns that would rather resemble narcolepsy than polyphasic sleep. That would go precisely against the goal of polyphasic sleepers, which is to sleep less. Polyphasic sleep pattern is inherently unstable, and changing levels of caffeine will have no bearing on this fact whatsoever.
As for normal healthy sleep (which polyphasic sleep is not), abstention from coffee is not necessary, but all caffeine drinks should be optimally taken only within the first hour after awakening
Vegan diet will not significantly change your
sleeping habits
(Aigars Mahinovs, Feb 06, 2006,
11:21:01)
Question:
Can
vegan diet help entrain polyphasic sleep? It is well known that
herbivores sleep
less
Answer:
The short answer is: No. Vegan diet will not
help you sleep polyphasically. The long answer is:
- polyphasic sleep cannot be naturally entrained for circadian reasons, and no diet can change this fact
- instead of minimizing sleep, you should optimize the amount of sleep. This means you should get exactly as much sleep as is needed to fulfill its neural functions
- the simple rule of the thumb for designing diets for optimum sleep is: focus on maximizing the general health effects of the diet. Healthy body will ensure healthy sleep
- vegan diet is sustainable, but requires a great deal of nutritional knowledge to be safe in the long-term. Vegetarian diets are far easier to compose for an average man, esp. with some backup from sea foods. Probably the safest and the simplest diet for optimum health is a diet high on plant foods, with some meat added as a safety valve. The optimum amount of meat is probably impossible to determine due to the sea of contradictory research findings. Another good rule of the thumb is: listen to your body. If modifications to your diet bring bad results then you might be heading in the wrong direction. But your body can fool you too, and you need to use solid, well-established nutritional guidelines to make sure you do not stray into untested waters. Knowledge of evolution and past human eating habits is helpful too
- as for the actual impact of the vegetarian diet on the demand for sleep, you might want to address this question to a nutritionist specializing in studying vegetarian diet as the field is huge, complex, and full of contradictory findings compounded by vested interests of those who promote vegetarianism on religious or ethical ground and feel little remorse while stretching the truth on the connection between the diet and health. Interestingly, there has been quite a deal of research on how deficient vegetarian diet (e.g. short on carnitine or exogenous FAs) might worsen hypersomnia or fibromyalgia
- from the point of view of neurophysiology, variations in healthy diet are unlikely to have a major impact on your sleep. You may only want to watch caffeine, alcohol, exotic herbal products, toxins, and all substances with a substantial effect on the nervous system. Otherwise, the diet should have only a minor impact on the demand for sleep, circadian patterns, homeostatic sleepiness (with a major exception for caffeine), progression of sleep stages (with a major exception for alcohol), or neural efficiency of sleeping. The reason for this is the same as in many other cases of homeostasis. The organism looks for specific nutrients in foods while striving at retaining homeostatic balance throughout all systems. Rare foods, herbal preparations, pharmacological intervention, etc. can always change or unbalance internal equilibria, but a standard healthy diet is far less likely to do so. It takes an extraordinary nutritional error to stop the human heart. It is even harder to stop the gene-based body clock.
- it is not true that herbivores sleep less, as there are many exceptions to the rule (there are herbivores that sleep three times as much as short-sleep carnivores). There is however a correlation, which says that the decrease in sleep time is faster with the increase in weight in herbivores than it is in carnivores. In other words, heavy herbivores, like giraffe, indeed sleep very little. This correlation may be explained by changes in metabolism, but it could also reflect a different lifestyle. A predator may eat once and then spend many hours on digestion, an elephant keeps munching all day long to sustain its energetic needs, while a gazelle needs to maximize vigilance to ward off an attack from a long sleeping lion
- the correlation between diet type (herbivore vs. carnivore) and the length of sleep links sleeping habits with eating habits of a species, not eating habits of an individual. While humans are omnivorous, you won't become a herbivore, and allegedly a short sleeper, by enforcing new eating habits
Your family doctor will not instantly spot the damage
resulting from polyphasic sleep
(H., Feb 03, 2006, 16:17:52)
Question:
I
know bloggers who adapted successfully to polyphasic sleep. One is also
doing
regular checkups with his doctor to make sure polyphasic sleep is not
harmful.
No damage has been found.
Answer:
Your
family doctor's ability to detect trouble on polyphasic regimen is
not much
different from his ability to see trouble in a novice smoker. The
damage is not
done instantly and it is not obvious. Moreover, a big part of the
damage is the
opportunity cost. It is not only what you have done to your health, but
also
what you have not accomplished as an individual due to your reduced
mental
capacity. Even less so, can your GP detect long-term effects of
possible damage
at the neural level and neural function to your long-term growth and
intellectual accomplishment. Things you do not learn today may change
the entire course of
your life. No one can estimate that cost. Even substantial neural
damage in
Alzheimer's disease is not easily diagnosed, and it does not become
obvious
until you are in advanced stages of cells loss.
Visiting your GP for a checkup is always a good idea. However, it is pretty useless in hope of preventing damage done by polyphasic sleep.
Most of bloggers who claim success with polyphasic sleep seem to have trimmed their standards of satisfactory alertness and creativity. When statements such as "my successful experiment" and "groggy" come together, you can be certain that "the experiment" does not effectively maximize their alertness and productivity. There might be also many other explanations; however, none of these is the disappearance of the natural circadian rhythmicity that makes polyphasic sleep impossible.
Taking more than one nap per day quarrels with
productivity goals
(Placebo, Feb 09, 2006, 04:57:04)
Question:
I
am experimenting with polyphasic sleep (blog).
You claim that having more naps adds no benefit. This I believe to be
patently
wrong, as adding extra naps is what eased my difficult stretches.
Answer:
You are right that in polyphasic sleep, every extra
successful nap will be
preciously helpful in restoring your mental energy. Even in a normal
sleeper who
is not sleep deprived, an additional nap is likely to bring increased
alertness
and improve mental performance. What is not true is that we should
strive at
having many naps during our working day. If your goal is maximum
productivity,
and if you sleep well in the night (i.e. you are not sleep deprived),
then any
nap attempt at times other than the siesta time will be wasteful. More
often
than not, you will not even manage to fall asleep. Resting with your
eyes closed
does not yield a fraction of benefit of an actual successful nap.
Moreover, even
if successful, an extra nap forced in in the morning is likely to
interfere with
your afternoon nap. Similarly, an evening nap may result in shortening
the night
sleep. Those extra naps may bring incremental improvement in
performance, but
will reduce the overall efficiency of sleep. Our biphasic nature makes
it quite
clear, we should take a single nap in the afternoon. For some people,
even this
will be too much, and monophasic pattern is their optimum
Your polyphasic sleep experiment is doomed to fail
(Placebo,
polyphasic sleep blog,
South Africa, Feb 09, 2006, 12:35:49)
Question:
If you could convince me somehow that everybody fails at it and I
cannot be any different then I might give up [my
polyphasic sleep
experiment]. One thing I've learnt about science is that
theories can and often are wrong. I respect science, and part of
science involves attacking a theory. I can do this by testing it. It's
about reward and risk. At worst it takes me some time to correct my
sleep patterns again. The reward is far greater than the risk in my
opinion, and leads me to be a human guinea pig :) I've already shown
that polyphasic can be successful for a short period of time. But it is
by no means plain sailing. Now I would like to see if I can turn that
around.
Answer:
Your willingness to change the dogma is praiseworthy. The
willingness to become a human guinea pig led to numerous discoveries in
the past. Yet you should always look for areas where you stand a
reasonable chance of success. If a number of areas of science
"conspire" to tell you that your effort is doomed, if a number of
researchers in controlled conditions produced discouraging results, if
you have evidence for the whole concept to be a product of human love
for myth-making, if your background equips your poorly for the job
(knowledge of sleep physiology would dramatically improve your
chances), if you know your plan is injurious to your health, your
choice may only be explained by insufficient study of the subject. With
the right attitude, your potential discoveries will not be undermined
if you devote a few months of intense study to this issue. Without some
prior investigation, we might all live in a dreamland of efforts
directed
exclusively at telekinesis, telepathy, teleportation or levitation. The
world of "dreamland science" would stagnate.
Nobody would work on mundane aspects of food science or material
chemistry. We do need crazy researchers ready to waste their lives for
a dream. Those people produce paradigm
shifts and they will teleport objects one day. Some great discoverers
avoided priming their brains with current research in fear of becoming
biased. Yet
statistically, knowledge is beneficial. And the
status quo, makes it easy to predict that your efforts will bring no
fruit.
Please use
SleepChart to track your progress. It would be highly
beneficial for your experiment if others could see and comment upon
your SleepChart data and your homeostatic sleep graphs (note that
circadian graphs are useless in polyphasic sleep due to the fact that
you regularly interrupt sleep with an alarm clock).
Link to your site will be published at supermemo.com (Feb 15, 2006).
Polyphasic Sleep article is biased
(Hong Sio,
July 25, 2006, 16:30:24)
Question:
From your article on polyphasic sleep I would say you are somewhat
biased. Perhaps what drives this view most strongly is the humor
section, where you isolate
bloggers' comments. It may serve to ridicule, but not for someone who
is searching for empirical evidence which is quite scarce. The "for
dummies" section did not help that impression one bit. Perhaps another
approach toward your argument would be to agree with polyphasic
sleepers that those naps go
straight to REM sleep. And from that point, provide evidence as to how
non-REM sleep is important to the growth and maintenance of the body
Answer:
The article is as biased against polyphasic sleep as you
would expect an article written by an oncologist to be biased against
smoking.
The article emphasizes the fact that extracts from blogs are added for purely comedic reasons. The simple reasoning that demonstrates that polyphasic sleep cannot be entrained is presented much earlier in the article (starting with "To sleep or not to sleep polyphasically"). You do not need "for dummies" nor "excerpt" sections to understand "the evidence" you are looking for. The evidence is not exactly "empirical" as there have been very few attempts to study polyphasic sleep in a lab (sleep researchers are rather interested in "serious" matters, not "teenage fads"). Yet a few simple facts of chronobiology will help you understand that the concept of "refreshing polyphasic sleep" is just an urban myth that spreads like wildfire in sleep-deprived and phase-shift maladapted community of young students and programmers.
The articles explains that "going straight to REM" is a myth (see also this FAQ). As for the importance of NREM for learning, you will find a plethora of scientific and popular scientific articles on the net (at supermemo.com, you can have a look at Good sleep, good learning)
Polyphasic sleep looks different before you begin
your trial
(kuactet, USA Educational,
Wednesday, August 16, 2006 2:10 PM)
Question:
Having read your article about polyphasic sleep, I am totally
unconvinced. The only thing that all of the people who failed at
polyphasic sleep have in common is this: they did not follow the
procedure. They either a) fell asleep when they shouldn't have, b)
overslept, or c) did something completely unexpected and irrational.
For example, I quote, "I thought... I'd try by starting to gradually
redistributing my sleep to 6 periods throughout the day".
If there is a procedure which works, you should follow the procedure
instead of going ahead and doing your own idiotic thing because you
think it might be better. The procedure is go cold turkey, and follow
the sleep schedule. If you want to demonstrate people that have failed
at polyphasic sleep, you have to show me people that have followed the
procedure and failed, not random people that failed at whatever they
wanted to do instead of polyphasic sleep.
Answer:
The argument against polyphasic sleep is entirely biological.
Knowledge of chronobiology tells us polyphasic sleep is impossible.
Personal stories included in the article were added for comedic effect
only. They are obviously no proof one way or the other.
Perversely, one could say that there is another thing all polyphasic beginners have in common. Before their trial, they all subscribe to your reasoning above. Once they read wild claims of the power of polyphasic sleep and blogs with (untrue) claims of success, they build a model of the adjustable body clock. Depending on the sources, beginners will choose a polyphasic schedule that is said to have been working for someone or allegedly for everyone. Needless to say, no such sleep schedule can ever succeed. The next step is the transition attempt. Again, depending on the sources, a polyphasic adept may believe going cold turkey is better, or gradual adaptation is better. Whichever the path, the outcome is inevitable: sleep deprivation, problems with oversleeping, problems with the adherence to the schedule. No wonder, all those who tried polyphasic sleep will inevitably look for errors in their approach and look for possible modifications to the schedule. At that point they become cannon fodder for those who are at the beginning of the road. After all, for the believers in the adjustable body clock, those struggling individuals may appear weak, and their experimentation, as you say "idiotic".
In other words, you can either study the biological argument against polyphasic sleep and give up, or you can plunge into your own time-wasting experiment and soon begin your own experimentation that others will call "idiotic". In the end, the outcome is preordained
You cannot improve your mental output by sleeping less
(#12668)
(David C., Dec 24, 2006, 10:10:54)
Question:
I generally agree that you should not try to sleep less, but even you
will agree that sometimes less sleep is better (i.e. wake-up at the end
of a cycle versus wake-up later (more sleep),
but in the middle of 90 min REM-NREM cycle)
Answer:
It might be better to have one sleep interrupted at the shallowest
sleep stage
as opposed to a deeper sleep later on. However, it does not affect the
simplest
sleep optimization strategy: sleep as much as your body needs.
In normal healthy conditions, you will always naturally wake up at the end of the last natural cycle of sleep. Healthy conditions include absence of stress, correct sleep hours, quiet and comfortable sleeping environment, etc.
Polyphasic sleep article is non-scientific (#23135)
(David Nelson, Jan 24, 2009,
01:02:27)
Question:
I
just read your article on polyphasic sleep and found it to be fairly
non-scientific in its claims. You state "It is possible to shift the
sleep phase, but it is not possible to change the length of the healthy
sleep block without inducing sleep deprivation". This statement is
factually incorrect. You make so many assertions with little evidence
to back them up. I'm not convinced. Have you heard of the Pirah
people? From Daniel Everett's field reports, every member of the tribe
rarely sleeps more than 2 hours per day. I personally know several
people that demolish your standard of required sleep. Thus I think you
should research the subject further and re-think your criticism of the
subject. Otherwise know that you will be ridiculed just as badly as the
people whose failed accounts you supply in your article
Answer:
It
would be more precise if an article stated that: "scientists do not
know any natural biological mechanisms that could be practically used
to reduce the length of sleep blocks without a detriment to health". In
this case, obviously, the absence of proof is no proof of absence. Such
mechanisms can be found at any time. If you believe you know scientific
facts to the contrary, please list them and they will be promptly
referred to in the article.
We can hormonally reduce the length of sleep blocks (e.g. by stress).
We can use an alarm clock (including the natural brain clock based on
the release of ACTH). We can sleep in a wrong phase. We can reduce the
homeostatic sleep drive (e.g. with coffee, reduced learning, limiting
exercise, etc.). All unnatural ways of shortening sleep time,
will
induce sleep
deprivation, which is a function of the degree of the interference with
sleep.
The net is buzzing with anecdotes that "demolish" the above claim, but
no established scientific fact can be used to the same effect. Piraha
people example should certainly be of interest for sleep science.
However, the inaccessibility of the tribe leaves little room for
research beyond speculating on a report by a missionary. A report could
be a simple exaggeration. It could also be an example of the dominance
of culture over physiology (as is the case with the "polyphasic
sleep" crowd). We know of many mutations that affect circadian
cycles, and it is conceivable to see a strong prevalence of a specific
gene in an isolated population. However, this would make Piraha sleep
depart far away from the standards well established in our primate
group. In short, sleep habits of a westerner would have to be further
from a Piraha member than from an orangutan.
Nobody yet mutated into a monster as a result of
using an alarm clock (#23046)
(Kop, Jan 13, 2009, 14:43:22)
Question:
In
your polyphasic sleep article you write that "Alarm clock is bad for
you". The vast majority of people in developed countries (I would say
more than 95%) uses an alarm clock regardless of their sleep schedule.
An alarm clock is as needed for monophasic sleepers as it's needed for
polyphasic sleepers. Take the alarm clock away from a typical person
and they won't just wake up on their own at their desidered time and
they will miss work, school, or whatever. An alarm clock can't be THAT
bad for you because of the simple fact that most people use it and I
never noticed any problem with them :) Everyone in my family has been
using one since they were children, and no one suddenly went crazy or
began to mutate into a monster (yet)!
Answer:
When you
use an alarm early in the morning in order to get to work or to school,
you cut off the later stages of sleep. If the intrusion into natural
sleep is not large (e.g. from minutes to an hour), the damage may be
limited. Alarm clock will do far more damage in a polyphasic sleeper
who is disrupting sleep at unpredictable points in both circadian and
sleep cycles. You can compare the use of alarm clocks to smoking or
eating hot dogs. The harm is not great enough to be instantly
noticeable. It took the public many years to largely accept that
"smoking is bad" or "fast food is bad". It is hard to quantify the
degree of damage. However, as we move to knowledge society where our
intellectual performance becomes increasingly important, the effects of
sleep deprivation will come under closer scruity and alarm clocks are
bound to gradually fall out of favor. Unlike hot dogs, they are already
universally hated by their users.
Note also that the actual regular use of the alarm clock in the
population is closer to 50%. Many people are able to adapt their sleep
to their schedules if their routines are regular enough. Those people
rarely or never need to resort to an alarm clock.
Chronobiologists
cannot be neutral towards polyphasic sleep as a lifestyle
(Scott, Feb
03, 2010, 05:21:18)
Question:
My main problem with your article about
polyphasic sleep is the way you demonize polyphasic sleep so entirely.
You are the first to admit that no real scientific study has been
performed on a human subject, so the scientific viewpoint should be one
of agnosticism.
Answer:
By analogy, ABC of chronobiology should tell one that polyphasic sleep is not feasible without incurring sleep deprivation and possible serious health effects in the long run. The article does not paint polyphasic sleepers as evil or diabolic. It only attempts to sound a clear warning to those who become interested in the concept.
Incidentally, there has been quite a deal of research done into sleep deprivation, shift-work and even polyphasic sleep itself. You might have picked a statement from the Comic Relief section: No researcher could ethically subject that many individuals to the mental torture of polyphasic schedule (many readers skip "meatier" portions of the text and focus their criticism on the part that was included for a humorous illustration of how painful polyphasic sleep can be). That statement was to emphasize that even if regular sleep interruptions might be interesting to investigate, there are ethical limits to research that is likely to be harmful to human subjects in the long run.
Polyphasic sleep:
Constructive Criticism
(superborred,
Apr 10, 2010, 12:18:50)
Question:
In reference to "Polyphasic Sleep: Facts and
Myths":
From what I have read of it, I have concluded to myself that you have
in fact tried polyphasic sleep, but did not last very long in the
process. I think that, not to be rude or disrespectful, your opinion is
very biased and your blog is not fit to be read. I think that you are
bashing everyone who would like to try or has already tried polyphasic
sleeping. Your blog is not aptly named. I am sorry for any
inconvenience this may have caused you, and I hope you will consider
rewriting this blog from an unbiased point of view or even trying
polyphasic sleeping. I await your reply paitently
Answer:
No.
I have never tried polyphasic sleep, and I will likely never try it. I
consider polyphasic sleep a very dangerous lifestyle choice. Luckily,
due to its unsustainability, the habit is self-extinguishing. Trying
polyphasic sleep would be similar to trying "lemon juice diet", which
is also a fad backed up by pseudoscience. ABC of biology tells me both
are seriously unhealthy.
There are no plans to rewrite the article, however, a followup will
address some of the confusion generated by the original article.
Triphasic sleep
(Brrr Cold,
Sep 20, 2010, 10:02:17)
Question:
What are your thoughts on triphasic sleep? One
main phase approx 6 hours with two 30 minute naps after meals:
00:00-06:00, 12:00-12:30, 18:00-18:30
Answer:
Like most of
artificial ways of making the sleep system work to your design, this
schedule is not likely to be efficient in the long run. Most people are
strongly biphasic, and only biphasic or monophasic sleep works well for
adults (see Optimum
napping times
for an exemplary graph).
However, if you throw away the second nap, you will be pretty close to
a natural biphasic rhythm. You will do far better on 0:00-6:00 and
13:00-14:00, even though, designer schedules should never be
recommended. If you can sleep at your desired times, you could best
download SleepChart, plot your natural sleep propensity, and figure out
your optimum sleep hours. The suggested biphasic schedule with an
hour-long nap at 13:00 could be your starting point. However, the
schedule determined by SleepChart, would be the ultimate destination.
Polyphasic sleep for
a 15 year old boy
(Keelan
Nobrega, Sep 20, 2010, 19:57:51)
Question:
I want to know what you think about me doing
polyphasic sleep. I'm a 15 year old boy who already requires very
little sleep. I usually get 5-6 hours daily, and even if I try to sleep
in I wake up after around 7 hours. I'm fairly smart and my creative
output is very good. I tried sleeping polyphasicially a year ago and
only made it 5 days before I decided to stop because of all of my
friend's worries. Before I stopped though, I realized that I was
getting less and less sleepy between 3am and 6am (which were the only
times I had problems staying up all night). But I also felt a little
weaker throughout the day. I was thinking it was because I needed more
food, since I was also getting more and more hungry. I went from being
able to eat 4 slices of pizza to 7. What do you mean my creative output
will be diminished? Is it just hard to think like when you try thinking
late at night? Or will my brain just be more stupid?
Answer:
I
believe that polyphasic sleep is pretty unhealthy, and should
particularly be avoided at such a young age when your brain develops
very fast. If you were less sleepy at 6 am on polyphasic sleep, and
more tired during the day, it can probably be best explained by a shift
in your sleep phase. This means that the period in which you are most
sleepy simply moved to a later hour. Sleep phase will behave
unpredictably in polyphasic sleep as your brain gets bombarded with
contradictory information when trying to differentiate the day from the
night. We have been programmed for millions of years to differentiate
between the two. Polyphasic sleep makes it impossible. Your being more
hungry may be unrelated to your actual energy expenditure. In sleep
deprivation or in sleep phase disorders, your brain will do many
strange things. Weaker immune system, problems with thermoregulation,
and errors in the appetite control system are hallmark symptoms. As for
your creative output, on polyphasic sleep, in poorly designed
shift-work, or in sleep deprivation, you will be less able to come up
with novel ideas and less able to solve problems. Your "hard thinking
late in the night" and being, as you say, "more stupid" are equivalent
here. It is the loss of the capacity of your neural networks to
organize information that makes thinking hard late in the night. If
your creative capacity is reduced, you can colloquially call it
"getting more stupid". In that sense, we all get "pretty stupid" late
in the night, only to wake up "smart" and refreshed with new ideas.
However, to get this nice effect, you need to sleep smart. Primarily
you need to sleep at the right time (as indicated by your body clock),
and you need to let sleep run its natural course, i.e. without
terminating it with an alarm clock.
A degree of adaptation occurs on a polyphasic sleep schedule
(Bryan Estes, Wednesday, August 04, 2010 7:15 PM)
Question:
Dr Stampi writes: "many experiments have provided direct evidence that adult humans have a surprising ability to adapt to different types and different levels of polyphasic sleep-wake behavior." This stands in contrast to your article about polyphasic sleep
Answer:
Dr Stampi's statement is general enough to be correct. For example, compression of sleep stages is a form of adaptation. This does not imply that an individual will be able to take multiple natural naps during the day. A consensus emerges in sleep research that, in healthy adult individuals, multiple Edisonian naps require a degree of sleep deprivation. Without deprivation, initiating sleep becomes pretty hard. "Multiple naps" should be understood as "more than one after consolidation", where "consolidation" is a process in which multiple naps spaced closely together are counted as one
Twenty years after Dr Stampi's book, we now more about sleep
(Bryan Estes, Wednesday, August 04, 2010 7:15 PM)
Question:
While you acknowledge Stampi's significance in the field of sleep research,
you don't explain your specific points of disagreement in the article. You do
quote from Stampi's book, to show that he is a prudent enough scientist to issue
a caveat to those inclined to make hasty conclusions from his intriguing
findings; but this is alone is insufficient.
Answer:
Specific points of disagreement are included in the article, even though
perhaps not stressed enough. It needs to be said that we are now armed with 20
years of extra research into sleep models, chronobiology and the neural
functions of sleep. From that advantageous perspective, the main two areas of
criticism would be (1) the insufficient emphasis on the importance of the
circadian component in determining the optimum sleep schedule, and (2)
overemphasis on performance tests that rely on the homeostatic component of
sleep. When Dr Stampi writes "the 4-hr ultradian cycle of sleep-wake pressure
previously described may be an important factor in allowing adaptation to
polyphasic patterns", he is not wrong; however, for optimum mental performance
the optimum sleep schedule should follow the circadian cycle first of all.
3 naps schedule
(Isaac Park, Aug 15, 2011, 16:00:31)
Question:
Would three, 3 hour naps spaced evenly around the day be equally unachievable as Uberman sleep?
Answer:
All designer sleep schedules should be avoided. Longer naps will probably do less damage than short naps. Fewer sleep episodes will probably work better. However, if your sleep episodes do not align with your circadian needs then they will lead to the same damaging situation as the polyphasic sleep: circadian chaos. If you want to sleep well and be productive, choose biphasic sleep, monophasic sleep, or free running sleep, whichever works best for you, and whichever you can afford. Free running sleep synchronized with the daylight cycle is the healthiest. Once you free run, you will determine quickly if your prefer to sleep biphasically or monophasically.