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What is Biphasic Sleep? Should You Adopt It?

What is Biphasic Sleep? Should You Adopt It?Updated on September 13, 2020 | Published on October 30, 2019

What is Biphasic Sleep? Should You Adopt It

In this fast-paced life, we all want to be productive and extract the maximum out of our bodies and minds. Sleep is one such thing that we all want to balance with our day to day goals and tasks. It is almost considered lucky in today’s time when someone has normal sleep patterns for insomnia and other sleep disorders are on an all-time high. A good deep sleep ensures that we have enough energy to implement our day to day tasks and don’t feel stressed.

It also keeps our mind and body healthy. Did you know that there are types of sleep patterns that you can willingly opt for, for more productivity and energy? There is monophasic sleep, biphasic sleep, and polyphasic sleep. Let’s see how these are different from each other.

What is Biphasic Sleep?

Also known as bimodal, diphasic, or bifurcated sleep, biphasic sleep is a sleep pattern in which a person sleeps in two segments in 24 hours. Sometimes it is also referred to as segmented sleep. While this may sound like a new-age idea, the fact is that it is one of the most ancient types of sleep patterns.

Different parts of the world use different sleep patterns. Biphasic sleep is popular in the Southern parts of Europe. As per our age and the country we live in, we pursue a particular sleep pattern, however, for some people, it can be a deliberate decision to opt for biphasic sleep, and some it can completely come naturally.

Further, biphasic sleep can be of three types –

  1. People may pursue a sleep pattern in which they divide their sleep into two parts during the night. For instance, a person will sleep early in the night and then wake up for a few hours and then sleep again near the dawn. Some people may also sleep till late morning. In total, such people can finish about 8-9 hours of sleep.
  2. Short naps – Some people may prefer a biphasic sleep in which they take short naps during the day or siestas for about 1-2 hours and then sleep for about 6 hours straight during the night.
  3. Long naps – Some people also like to take long naps during the day time, which means they sleep for about 3 hours in the afternoon and sleep for about 5 hours straight during the night.

What is Monophasic Sleep?

Most people in the United States pursue monophasic sleep. Since most people also work during the day time, they don’t get time to nap in the afternoon even if they want to. The sleep pattern in which a person sleeps only one time in 24 hours is known as monophasic sleep. Such people finish their sleep of 6-8 hours in one stretch, mostly during the night hours. It was the industrial revolution of the 18th and 19th centuries that pushed people to work during the day and have a monophasic sleep pattern. Recent research studies, however, show that for our bodies biphasic sleep pattern is more beneficial. We will look at all its benefits later in this article.

What is Polyphasic Sleep?

When the sleep patterns are broken into multiple parts during the day, it is known as polyphasic sleep. Polyphasic sleep can further be of different types and it depends on the person to person. However, there are two common types of these sleep patterns. One, in which a person takes one long stretch of sleep of about 5-6 hours and then takes around 3-4 20 minutes nap during the day. Another one is where a person sleeps only for about 3 hours in one stretch and takes 4-5 naps during the day. Some people finish their 8 hours of total sleep by dividing sleep time into multiple parts and some people just thrive on small naps to increase productivity.

It should be noted that some people have a type of polyphasic sleep pattern because of insomnia, stress, sleep deprivation or any other sleep disorder while some other people have it naturally. It is best to consult a doctor to recognize your sleep pattern and then work on the one that you want to achieve.

History of Biphasic Sleep

A famous historian and sleep pattern expert, Roger Ekirch, has presented more than 500 references to prove that before the industrial revolution, segmented sleep was quite common. He has written a book called At Day’s Close: Night in Times Past in which he argues that till the 17th century, people used to sleep in two phases. Between these phases there would be wakefulness of about one hour to perform various activities such as thinking about dreams, staying in bed, talking to their spouse, smoking, having sex, etc.

Another sleep scientist, Thomas Wehr, performed a study in 1992 which said: “In short photoperiods, human sleep is biphasic”. For this study, he put 8 healthy people in a room for 14 hours every day for a month. At first, all these people slept for straight long hours but gradually, they started sleeping for 4 hours straight and then woke up for about 2 hours in the middle and then slept again.

There is a lot of historical evidence to prove that biphasic sleep is an ancient kind of sleep pattern. Even literature from the 14th century shows evidence of how it was common for people to sleep in segments. In The Canterbury Tales, one character has been recorded to say that she would return to bed after her first sleep. It had an explicit mention of “first sleep” and “second sleep”. Some scientists also suggest that due to the invention of light, people shifted from biphasic sleep to monophasic sleep pattern.

What Science says for Biphasic Sleep?

A study by the School of Psychology, Flinders University, Adelaide, says napping can be good for cognitive functioning. It further says that naps also reduce sleepiness. In another journal published in 2009, Brock University’s professor says, naps improve performance in areas such as logical reasoning, symbol recognition and reaction time. However, there are also many sleep experts, psychiatrists, and doctors who suggest a straight and deep sleep for better and effective functioning. Such studies and reports can be contradictory, however, most of them give us a hint that there are no disadvantages of napping if you finish an overall 7-8 hours of sleep. It is also certain that by changing sleep patterns, we change the flow of sleep hormone, melatonin, and circadian rhythms.

What is Biphasic Sleep? Should You Adopt It
Benefits of Biphasic Sleep

Benefits of Biphasic Sleep

People who have adopted biphasic sleep patterns, have recorded their statements and have spoken about the benefits of it. Some of the benefits involve –

1. Flexibility


Dividing your sleep into two parts can make your entire day’s routine much more flexible. You may get more time to perform activities.

2. More alertness

More alertness
More alertness

When we sleep for a long hour on a stretch, we spend the rest of the hours doing tiring and exhausting activities. Working for so many hours constantly decreases our productivity and alertness. It puts us into lethargy. Thus, taking a nap in the middle can revive our energy back and make us more alert.

3. More productivity

More productivity
More productivity

When we work constantly for long hours our brain stops working efficiently after a certain period. Some people also experience brain freeze or brain block, Creative people or writers may run out of ideas. While taking a break for coffee or tea helps but sleeping for a small interval rejuvenates your body and almost hits a restart button, making you more productive.

4. Improved memory and mood

Improved memory and mood
Improved memory and mood

A lot of people have claimed that after they started sleeping in segments, their memory has improved. They remember things better. People have also shown improvement in their mood patterns. They feel happier and satisfied.

5. Reduce stress and fatigue

Reduce stress and fatigue
Reduce stress and fatigue

Most benefits of napping are also benefits of biphasic sleep. People who have segmented sleep habits or habit of napping tackle stress and fatigue better. They make fewer errors at work. Their problem-solving abilities, cognitive function and ability to learn new things increase manifold.

What to keep in mind?

Since there is still research going on on the benefits and drawbacks of segmented sleep patterns, you must not make a decision in a hurry and voluntarily change your sleep-wake cycle. This decision should be taken with a lot of precautions. Different people have different types of sleep patterns. You must not try to compare yourself with any other person. First, you need to check if your current sleeping pattern is working for you or not. If your sleeping pattern is working out well for you then you don’t have to worry about changing it. Here are a few things you can notice in yourself –

  1. Stress level
  2. Temperament
  3. Focus abilities
  4. Concentration power
  5. Energy levels
  6. Irregular sleep patterns

Further, it is also important to note that if you have depression, PTSD, BPD or any other disorder, you shouldn’t opt for biphasic sleep habits without consulting your doctor. In such cases, doctors mostly suggest sleeping at night for long hours. Some people wake up in the middle of the night because of insomnia and sleep disorders. Do not misunderstand any such disorder with a natural biphasic sleeping schedule.

Closing thoughts

If you are someone who works the whole day at an office place then it may not be possible for you to take naps during the day. However, you can try segmenting your sleep into two parts, divided by one hour break. You can try to utilize that one hour for some activities that you like to do.

Make sure that when you do such an experiment, you keep your phone and other disturbing elements away since they can disturb your segmented sleep and make you more agitated and tired.

Eventually, what’s really important is for the body and mind to feel fit and healthy. While biphasic sleep can be beneficial for you, you have to ensure that you also implement other methods such as healthy eating, exercising, etc to keep your sleeping pattern regular and consistent.