Herbie Murray
Polyphasic sleep is a sleep pattern that involves more than two sleep episodes within a 24-hour period. This means that instead of the monophasic sleep pattern, which is the norm for humans and involves one period of sleep per day, or the biphasic sleep pattern, which involves two periods of sleep, polyphasic sleep involves multiple sleep periods. This could take the form of quick naps throughout the day balanced with a reduced time asleep during the night. While some people claim that polyphasic sleep increases their productivity and energy levels, there is no scientific evidence to support these claims, and it may lead to health and safety risks.
| Characteristics | Values |
|---|---|
| Definition | Polyphasic sleep is any sleep of multiple periods in the course of 24 hours. |
| Types | Triphasic, Dymaxion, Uberman, Everyman |
| Common in | Mammals, birds, human infants |
| Benefits | May increase productivity, May improve mental clarity, May increase energy levels |
| Risks | Sleep deprivation, Circadian rhythm misalignment, Negative impact on health and safety |
| Research | No evidence of benefits, No evidence of improved productivity or mental clarity, Anecdotal evidence only |
| Recommendations | Not recommended, May be considered in extreme conditions, Not suitable for everyone |
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What You'll Learn
The benefits of polyphasic sleep
Polyphasic sleep involves breaking traditional sleep schedules into multiple shorter periods. This means sleeping in more than two segments per day, with quick nap breaks throughout the day balanced with a reduced time asleep during the night.
Polyphasic sleep may be beneficial in situations where it is not possible to follow a regular sleep schedule, such as when travelling across multiple time zones, or for those with irregular work schedules. For example, polyphasic sleep can be useful for solo sailors leading into a race to help them manage limited sleep while racing. It can also be beneficial for students who are cramming for exams, involving a series of short naps whenever they lose focus.
Some people adopt polyphasic sleep as a way to reduce their overall sleep time and maximise their wakeful hours. Anecdotal reports from polyphasic sleepers suggest benefits such as increased productivity, alertness, and the ability to learn and retain information. However, there is little scientific evidence to support these claims.
Polyphasic sleep may also increase the risk of sleep deprivation and other associated side effects, and it is not recommended for everyone. It is important to consider the potential benefits and risks before adopting a polyphasic sleep schedule, and individuals should be aware of their own sleep needs.
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The risks of polyphasic sleep
Polyphasic sleep is the practice of distributing multiple short sleep episodes across a 24-hour day. While some people claim to thrive on as little as two hours of total sleep per day, there are several risks associated with polyphasic sleep.
Firstly, polyphasic sleep can disrupt the body's natural light-dark cycle, which is essential for the brain to create its internal clock. This misalignment of the circadian rhythm can negatively impact the body's hormonal and biological processes, increasing the risk of developing certain health conditions. For example, sleeping in shorter bursts can disrupt hormone release, leading to negative metabolic and dietary changes that increase the risk of chronic conditions such as diabetes and obesity. Additionally, polyphasic sleep has been associated with increased sleepiness and reduced reaction time, which can elevate the risk of accidents.
Secondly, polyphasic sleep schedules that severely limit sleep can lead to the same health risks as other forms of sleep deprivation. Sleep deprivation is strongly associated with cognitive impairment, memory problems, and even suicidal thoughts and behaviours. Research has also linked irregular sleep patterns with poorer academic performance and impaired decision-making. While polyphasic sleep may provide greater productivity due to increased working hours, there is little scientific evidence to support claims of improved mental clarity or overall productivity.
Furthermore, polyphasic sleep schedules may not be sustainable in the long term. While they can be useful for short-term situations, such as managing limited sleep during a race for solo sailors, they are challenging to maintain over an extended period. This is because polyphasic sleep schedules often require strict adherence to multiple sleep episodes throughout the day, which may not be feasible or practical for most individuals' daily routines.
In conclusion, while polyphasic sleep may work for some individuals with irregular work schedules or specific genetic factors, it carries potential risks that should not be overlooked. Disrupting natural sleep patterns can have adverse effects on both physical and mental health, and it is crucial to prioritize getting sufficient sleep to maintain overall well-being.
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The different types of polyphasic sleep schedules
Polyphasic sleep is any sleep of multiple periods in the course of 24 hours. It is the practice of distributing multiple short sleep episodes across the 24-hour day rather than having one major and possibly a minor ("nap") sleep episode each day.
There are several types of polyphasic sleep schedules, including the Dymaxion schedule, the Uberman schedule, the Everyman schedule, and the Triphasic schedule.
The Uberman Sleep Schedule involves six 20-minute naps spaced evenly throughout the day, totalling two hours of sleep per 24-hour period.
The Everyman Sleep Schedule includes sleeping for three hours during the night and supplementing with three 20-minute naps throughout the day, for a total of four hours of sleep each 24-hour period.
The Triphasic Sleep Schedule involves three short sleep periods after dusk, before dawn, and in the afternoon, providing a total of four to five hours of sleep per 24-hour period.
The Dymaxion schedule is likely the most extreme type of polyphasic sleep schedule, with only two hours of sleep in a 24-hour period.
Polyphasic sleep schedules are not for everyone and may cause sleep deprivation. There is no scientific evidence that polyphasic sleep is more beneficial for shift workers. Anecdotal reports from followers of polyphasic sleep schedules often include claims of increased productivity, alertness, and ability to learn and retain information. However, there is no scientific evidence that this practice is effective or beneficial, with research not recommending a fragmentation of sleep.
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The history of polyphasic sleep
The Renaissance
Leonardo da Vinci, the famous Renaissance painter and inventor, is often credited as the first to implement this unusual sleep schedule, and his schedule is now known as the "da Vinci Sleep Schedule". Other innovators such as Nikola Tesla and Thomas Edison also utilized power naps, believing that sleep was a waste of time.
The Medieval Era
References to the system of sleeping twice or segmented sleep can be found throughout the Medieval Era, with evidence of the practice in locations as diverse as Africa, South and Southeast Asia, Australia, South America, the Middle East, and Europe. The Greek biographer Plutarch, the Greek traveller Pausanias, the Roman historian Livy, and the Roman poet Virgil allude to the practice in their works. In France, the initial sleep was called the "premier somme", while in Italy, it was the "primo sonno".
Industrialization
Before industrialization, polyphasic nighttime sleep or segmented sleep was a common practice across societies. However, with the advent of industrialization, monophasic sleep became the norm.
The 1940s
In the 1940s, people began experimenting with polyphasic sleep as a way to reduce time spent in bed. One famous example is Fuller, who maintained an extreme type of polyphasic sleep schedule, sleeping only two hours in a 24-hour period. He eventually had to quit this schedule due to conflicts with the sleep schedules of his business associates.
Today
Today, polyphasic sleep schedules remain a subject of interest, with some people experimenting with alternative sleeping schedules to increase productivity. However, research has not supported the claimed benefits of polyphasic sleep, and concerns have been raised about potential health and safety consequences.
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Who polyphasic sleep works for
Polyphasic sleep is a sleep pattern that fragments sleep into multiple short segments spread across a 24-hour day. It is the opposite of monophasic sleep, which is the most common sleep pattern, involving one period of sleep within 24 hours.
Polyphasic sleep may be a good fit for those who feel well-rested and alert with shorter sleep periods. It is also a good option for those with flexible schedules that allow for multiple sleep sessions throughout the day. It may also be beneficial in situations where it is not possible to follow a regular sleep schedule, such as when travelling across multiple time zones or for those with irregular shift work or on-call work.
Polyphasic sleep has been studied as a strategy to improve performance in situations where extreme sleep deprivation is inevitable, such as for long-distance sailors or soldiers. Some people, such as young people cramming for exams, may also use polyphasic sleep to maximise their time awake.
However, polyphasic sleep is not for everyone and may cause sleep deprivation. It requires strict adherence to sleep times, which can impact one's social and work life. It may be challenging for those with fixed work schedules or family commitments, especially those with a new baby. It is important to consider the long-term effects on one's health, as disrupting the natural sleep cycle and sleep deprivation can negatively impact physical and mental wellbeing over time.
There is also no scientific evidence that polyphasic sleep is more beneficial than monophasic sleep. Research has shown that polyphasic sleep can impair cognitive function, memory, mental health, and learning abilities. Therefore, if maintaining a regular sleep schedule is an option, it is likely best to avoid polyphasic sleep.
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Frequently asked questions
Polyphasic sleep is a sleep pattern that involves more than two sleep periods in a 24-hour cycle. It is the opposite of monophasic sleep, which is the norm for humans and involves one period of sleep within 24 hours.
The Dymaxion schedule, developed in the 1920s by Buckminster Fuller, is one of the most well-known and drastic polyphasic sleep schedules. It involves four 30-minute naps every six hours, totalling only two hours of sleep per day. The Everyman schedule is a modified version of the Dymaxion schedule, offering a core sleep period of three hours plus three 20-minute naps daily. The Triphasic sleep schedule involves three sleeping periods after dusk, before dawn, and in the afternoon, totalling four to five hours of sleep within a 24-hour period.
Polyphasic sleep may be more suitable for people with irregular work schedules, such as shift workers, students, or those who work in jobs that require them to be on call. However, there is no scientific evidence that polyphasic sleep is more beneficial for these individuals.
Proponents of polyphasic sleep claim that it can increase energy levels and improve productivity by allowing people to enter short-wave sleep (deep sleep) and maximise their wakeful hours. It may also be beneficial in situations where getting a full night's sleep is not possible, such as during long-distance solo boat racing or shift work.
Polyphasic sleep can disrupt the body's natural circadian rhythm, negatively impacting the hormonal and biological processes that rely on this rhythm. It can also lead to chronic sleep deprivation, which is associated with various adverse physical and mental health outcomes, including an increased risk of suicidal thoughts and behaviours.
