68 (Surprising) Sleep Facts: Scary, Important, Interesting, Fun!

As humans we spend an average of 25 years sleeping, that’s a third of our life. However we’re simply not getting enough, which is why we’ve compiled the most shocking and interesting sleep facts.

Discover who sleeps the least, who sleeps the most, how to get more sleep plus some fun facts thrown in there just to make you smile.

General Sleep Facts

  • Research shows that adults need at least seven hours of sleep every night to function effectively throughout the day, however a lot of Americans are getting much less.

1. Only 21% of Americans get the recommended seven to eight hours sleep each night.

Only 21% of Americans get the recommended amount of sleep-each-night

This is in stark contrast to the people of France, who sleep on average 8.83 hours per day, the best country for sleep in the developed world. However some people can survive on much less, in fact 1% to 3% of the population are known as ‘short sleepers’ who need less than six hours a night.

2. Humans are the only mammals that delay sleep.

3. Donald Trump claims to be a ‘short sleeper’, needing less than six hours sleep a night.

4. The average person falls asleep in seven minutes.

5. If it takes you less than five minutes to fall asleep, it’s likely that you’re sleep deprived.

Others take much longer to fall asleep, in fact thousands of Americans suffer from a condition known as Somniphobia, which is a fear of falling asleep.

6. 60% of American adults experience sleep problems at some time.

7. Insomnia is the most common sleep disorder.

8. Snoring affects 37 million Americans.

Who’s getting the most sleep?

Americans in general aren’t getting enough sleep, however look a little closer at the facts and statistics about lack of sleep and you can see who seems to be getting the most sleep and who is getting the least.

9. Women sleep more than men.

Women Sleep More than Men
  • The reason for this is women are more likely to multitask, meaning their brains work harder and therefore take longer to recover.

Young people of high school age need 9 to 10 hours of sleep a night, this is due to brain power they need for learning and also to fuel their changing bodies.

Also during the teenage years the sleep-wake cycle changes, so the melatonin release that induces sleep happens later in the evening, creating a highly energetic teen in the evening and a less-than-enthusiastic person in the morning.

Research does show however that they’re not getting the sleep they need.

10. Two thirds of US high school students get less than 8 hours of sleep on school nights.

11. Female US high school students get less sleep than their male counterparts.

Parents are another group of people not getting the sleep they need!

12. Parents of newborn babies lose 6 months worth of sleep in the first 2 years of their child’s life.

13. Each child in a mother’s household increases her risk of getting insufficient sleep by 46%.

14. Mothers who breastfeed and co-sleep get more sleep in a 24 hour period than those that don’t.

15. Research shows that having a newborn baby impacts men’s sleep more than women’s.

Having a Newborn Baby Impacts Men’s Sleep More than Women’s

The study followed a number of couples in the first few months of their child’s life to see how the parents’ sleep was impacted.

As many previous studies only looked at the impact on mothers, this study also focussed on fathers.

Participants wore wrist trackers to see how they slept throughout the night. Though women woke more frequently in the night, men overall had less sleep.

Babies however are getting plenty of sleep, which is where the expression ‘sleep like a baby comes from’, unfortunately not always during the night.

16. Newborn babies sleep on average 15-16 hours in a 24 hour period.

Your career can also have an impact on how much you sleep.

17. Are you a creative person? Research shows you’ll sleep more but not as well.

18. Shift workers who work nights lose more sleep than those who work during the day.

19. Those who fly regularly for work could be more at risk of sleep deprivation. Flying at high altitudes leads to disturbed sleep due to the lack of oxygen.

Fun fact:

“Fancy a career as a ‘knocker-up’?” Before alarm clocks were invented, factories employed people to knock on the bedroom windows of their workers with a long stick, to ensure they arrived at work on time.

Importance of Sleep Facts

Everyone knows that sleep is important, however some of the facts around the importance of sleep are quite shocking.

  • Mental health and wellbeing is an area that is significantly impacted by a lack of sleep.

20. More than half of Americans lose sleep due to stress or anxiety.

21. Three quarters of those who suffer from depression also suffer from a lack of sleep.

22. Getting less than 7 hours sleep each night can make you angry, sad and stressed.

23. One sleepless night affects your brain in the same way as being drunk.

24. Lack of sleep can affect your memory as sleep triggers changes in the brain that solidifies memories.

25. Research shows a lack of sleep can cause weight gain.

Not only that but when you’re asleep you can actually burn calories, so sleep is so important if you want to maintain a healthy weight.

  • In fact you can lose a pound of weight during a night’s sleep simply by exhaling.

26. ‘Morning people’ are more likely to be successful in their careers.

27. Adults who sleep for less than 7 hours a night are more likely to report suffering from asthma, cancer and diabetes.

28. People who sleep less than 7 hours each night are 12% more likely to die prematurely.

However too much sleep can increase your chances of an early death.

Did You Know?

You can survive for 60 days without eating, but people can only live 11 days without sleeping.

Lack of sleep has also been found to have a serious impact if you’re behind the wheel, with many scary and worrying facts relating to drowsy driving.

29. More than 1,500 deaths a year in America are caused by drivers falling asleep behind the wheel.

30. An estimated 1 in 25 drivers reported falling asleep at the wheel in the last 30 days.

Did You Know?

In New Jersey they have a law known as ‘Maggie’s Law’, which makes it illegal to drive after being awake for 24 hours.

As well as good night’s sleep, you might want to take a nap now and then! In fact napping at work has been shown to improve productivity.

Did You Know?

More and more companies in Japan are encouraging their staff to sleep on the job as they believe it improves productivity.

31. The perfect nap, according to NASA, lasts for 26 minutes.

Get your facts straight!

Insomnia Facts

Health Facts

Sleep Stages Facts

  • During the night we go through five different sleep stages.

The first four stages are non-rapid eye movement (NREM) sleep, when your body starts to relax and prepare to rest.

Stages 3 and 4 of NREM are thought to be the deepest stages of sleep when your body begins to restore itself.

The 5th stage of sleep is rapid eye-movement (REM) sleep, when the brain is active and you most commonly dream.

REM sleep is thought to occur every 90 minutes during your night.

32. You spend roughly 75% of the night in NREM sleep.

33. When you’re in REM sleep your brain is almost as active as when you are awake.

34. During REM sleep chemicals in your brain paralyse your muscles to stop you acting out your dreams.

35. Got a problem? Sleep on it! REM sleep is proven to help creative problem solving.

36. Newborn babies spend twice as much time in REM sleep than adults do.

However the muscles of newborn babies don’t become paralysed in the way they do for adults, as that part of the brain is not yet fully developed, which is why babies often twitch and make sudden erratic movements in their sleep.

Newborn babies spend twice as much time as adults do in REM sleep

Better Sleep Facts

So a lot of us aren’t getting the sleep, luckily there are a number of different things that can impact your sleep that you can avoid.

37. Using your phone or a tablet before bed can affect your sleep.

Any light before bed isn’t good for getting off to sleep, however the blue light emitted by technology is twice as bad!

Phone or tablet usage before bed can impact on your sleep

  • Secretion of melatonin, the sleep inducing hormone, is impacted by light and by blue light in particular.

38. Drinking coffee before bed delays your internal body clock by 40 minutes.


“You can catch up on your sleep.”

Research shows that though a good night’s sleep can improve daily performance, if you are chronically fatigued you’ll feel it most in the afternoon and evening as your body runs out of energy.

39. People who procrastinate are more likely to have problems with sleep.

40. Those who suffer from back pain have worse sleep.

Luckily there are a number of different things you can try to help you improve your sleep.

41. Sleeping under a weighted blanket can improve your sleep and has even been proven to help those who suffer from insomnia and anxiety.

42. Believing you’ve slept well, even if you haven’t, is believed to improve performance.

A 2014 study published in the Journal of Experimental Psychology found that telling participants that they’d have a good night’s sleep, even if they hadn’t, made them perform better in tests.

Believing you've slept well is believed to improve performance

43. Cool your room down to between 60 and 67 degrees Fahrenheit for the best quality sleep.

44. Having a regular massage is shown to improve sleep.

45. Regular physical exercise can help you sleep better.

46. 30 minutes of exercise each day correlates with 14 extra minutes of sleep per night.

47. Yoga is proven to help you improve sleep.

Yoga Nidra is a technique that invites you, usually at the end of your yoga routine, to relax every part of your body and cool it down to encourage a deep and relaxing sleep.

48. Meditation has been shown to improve sleep.

Meditation has been shown to improve quality of sleep
  • Researchers at Harvard University found that mindfulness meditation provoked a relaxation response in participants leading to better sleep.

Sleeping Position Facts

Americans certainly have favourite positions when it comes to sleep, however certain positions have shown to be better for your overall health.

49. 47% of Americans sleep in the foetal position.

50. Women are more likely to sleep in the foetal position.

51. The log position is the least popular sleep position. Which is sleeping on your side with both arms down.

52. Gen Xers and Millennials are more likely to sleep in Freefall position (arms and legs outstretched).

Gen Xers and Millennials are more likely to sleep in Freefall position

Andrew Bang of the Cleveland Clinic reported that “the body likes variety” when it comes to sleep, so will commonly move from one position to another.

However if you’re wondering which sleep position is healthiest, the consensus seems to be that on your back is best for your overall health.

53. Sleeping on your back is the best position for your health as it allows your back, neck and spine to rest in a neutral position.

Did You Know?

The wealthiest Egyptians slept with uncomfortable neck supports rather than pillows to save their elaborate hairstyles.

  • During pregnancy women are advised to sleep on their side rather than on their back, as the latest research shows that the risk of stillbirth is doubled if a pregnant women sleeps on her back in the third trimester.

54. If all pregnant women in the UK slept on their side in the third trimester, around 130 babies’ lives would be saved each year.

Dream Facts

Of course one of the other benefits of sleep are dreams, well if they are good ones!

There are a number of scientific facts about dreams and how they can be impacted by a range of different health conditions.

55. When suffering from depression you dream up to 3 to 4 times more than you normally would.

Did You Know?

Research shows that those raised with a black and white television are more likely to dream in black and white.

Vivid dreams or nightmares can also be an early warning sign of a number of different conditions including heart problems and migraines.

56. Violent dreams can be the sign of a brain disorder including dementia.

57. Women are found to have more nightmares than men and also have more emotional dreams.

Did You Know?

Those who go blind later in life can still see visually in their dreams.

Sleep World Records

There are some incredible sleep records that just have to be seen to be believed.

58. Think you’re sleep deprived? The record for the longest period without sleep is 11 days.

  • There is currently no record for the person sleeping for the longest length of time, as it’s too difficult to prove.

Also there are a number of conditions that can cause people to sleep for long lengths of time such as when people are in a coma and Kleine-Levin Syndrome, so it would be hard to determine.

Did You Know?

The largest pyjama party on record included over 2000 participants.

Fun Sleep Facts

There are so many fun and completely random facts about sleep too!

59. Dutch researchers found that sleeping with your socks on can increase your ability to reach an orgasm.

60. 8% of Americans sleep naked.

Did You Know?

The letter Z is used to symbolise sleep as comic artists needed a way to depict that a character was sleeping in a sketch. ‘Zzzzz’ was meant to indicate the sound made when asleep.

61. Deaf people make sign language in their sleep.


“Eating cheese gives you nightmares.”

There is no scientific proof that backs up the idea that cheese gives you nightmares. However some research does show that different types of cheese can give you different types of dreams.

Did You Know?

You can’t sneeze when sleeping.

That’s right it’s impossible to sneeze when sleeping as we don’t breath in enough air to stimulate a sneeze.

62. 40% of Americans always sleep on the same side of the bed.

Did You Know?

It’s illegal to lie down and fall asleep wearing your shoes in North Dakota.

63. Trees go to sleep at night by relaxing their branches and perk them up in the morning.

Did You Know?

In 1849 the David Atchison became President of the United States for just one day and he spent the majority of it fast asleep in bed.

64. Relaxing classical music has been proven to help you fall to sleep.

Some sleep facts are a bit scary.

65. In a recent study, 50% of UK pilots surveyed admitted to having fallen asleep while flying a passenger plane.

66. There are more car accidents on the Monday after the spring DST clock change, due to sleep deprivation.

Fun Animal Sleep Facts

We might not be getting as much sleep as we should, however our friends in the animal world are doing much better.

Koalas can sleep 18-20 hours every day and cats sleep for 70% of their lives, however snails are one of the sleepiest animals.

67. Snails can sleep for three years.

68. Giraffes can get by on an average of 30 minutes of sleep a night.

Animals do have some unique ways of going to sleep. Rabbits commonly sleep with their eyes open and horses sleep standing up.

Sea otters have the most adorable way of falling asleep, they hold hands as they sleep so they don’t drift away from each other.


  1. MacCormick, H. (2015) New recommendation: Adults need at least 7 hours of sleep each night. [Online] Available from: https://scopeblog.stanford.edu/2015/06/02/new-recommendation-adults-need-at-least-7-hours-of-sleep-each-night/ [Accessed 24 March 2018].
  2. Breus, M.J. (2011) Could You Be A Super Sleeper?. [Online] Available from: https://www.psychologytoday.com/us/blog/sleep-newzzz/201104/could-you-be-super-sleeper [Accessed 24 March 2018].
  3. Collins. (2018) Somniphobia. [Online] Available from: https://www.collinsdictionary.com/submission/6995/Somniphobia [Accessed 24 March 2018].
  4. Paediatrics & Child Health. (2008) Teens and sleep: Why you need it and how to get enough. [Online] Available from: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2528821/ [Accessed 24 March 2018].
  5. BBC. (2003) Teenagers: Sleeping patterns. [Online] Available from: http://www.bbc.co.uk/science/humanbody/mind/articles/emotions/teenagers/sleep.shtml [Accessed 24 March 2018].
  6. Baldock Museum and Local History Society. (2008) The Knocker-up of Baldock. [Online] Available from: http://www.baldockhistory.org.uk/downloads/History-People-Knocker-Upper.pdf [Accessed 24 March 2018].
  7. The Fact Speak. (2016) You burn more calories sleeping than you do watching television. [Online] Available from: http://www.thefactspeak.com/burn-calories-sleeping/ [Accessed 24 March 2018].
  8. Krulwich, R. (2013) Every Night You Lose More Than A Pound While You’re Asleep (For The Oddest Reason). [Online] Available from: https://www.npr.org/sections/krulwich/2013/06/19/193556929/every-night-you-lose-more-than-a-pound-while-youre-asleep-for-the-oddest-reason [Accessed 24 March 2018].
  9. The Good Body. (2017) 70 Quick Health Facts: Food, Fitness, Hydration, Random (Fun!). [Online] Available from: https://www.thegoodbody.com/health-facts/ [Accessed 24 March 2018].
  10. Helmenstine, A.M. (2018) How Long Can You Live Without Food, Water, Sleep, or Air?. [Online] Available from: https://www.thoughtco.com/living-without-food-water-sleep-4138375 [Accessed 24 March 2018].
  11. American Safety Council. (2018) Drowsy Driving. [Online] Available from: http://www.safemotorist.com/NewJersey/Driving/drowsy_driving.aspx [Accessed 24 March 2018].
  12. Wadley, J. (2015) Sleeping on the job? Actually, that’s a good thing. [Online] Available from: http://www.ns.umich.edu/new/releases/22985-sleeping-on-the-job-actually-that-s-a-good-thing [Accessed 24 March 2018].
  13. McCurry, J. (2014) Japanese firms encourage their dozy workers to sleep on the job. [Online] Available from: https://www.theguardian.com/world/2014/aug/18/japanese-firms-encourage-workers-sleep-on-job [Accessed 24 March 2018].
  14. Harvard Medical School. (2007) Natural Patterns of Sleep. [Online] Available from: http://healthysleep.med.harvard.edu/healthy/science/what/sleep-patterns-rem-nrem [Accessed 24 March 2018].
  15. Paddock, C. (2010) Chronic Sleep Loss Not Easy To Recoup, Impairs Performance. [Online] Available from: https://www.medicalnewstoday.com/articles/176079.php [Accessed 24 March 2018].
  16. The Art of Living. (2018) As Restorative As Sleep – Relax Yourself With Yoga Nidra. [Online] Available from: https://www.artofliving.org/uk-en/yoga/health-and-wellness/restorative-sleep-relax-yourself-yoga-nidra [Accessed 24 March 2018].
  17. University of Cambridge. (2018) Triumph, Protection and Dreams: East African Headrests in Context. [Online] Available from: http://www.fitzmuseum.cam.ac.uk/gallery/headrests/index.html [Accessed 24 March 2018].
  18. Tommy’s. (2018) Sleep position and stillbirth risk. [Online] Available from: https://www.tommys.org/pregnancy-information/sleep-side/sleep-position-and-stillbirth-risk-press-release [Accessed 24 March 2018].
  19. Murzyn, E. (2008) Do we only dream in colour?: a comparison of reported dream colour in younger and older adults with different experiences of black and white media. [Online] Available from: http://discovery.dundee.ac.uk/portal/en/research/do-we-only-dream-in-colour(e54cb8b5-bfc6-4c63-acec-535ded9170d0).html [Accessed 24 March 2018].
  20. Kaur, J. (2013) Dreams May Be Linked To Health Problems, Experts Say. [Online] Available from: http://www.ibtimes.com.au/dreams-may-be-linked-health-problems-experts-say-1320492 [Accessed 24 March 2018].
  21. Kerr, N., & Domhoff, G. W. (2004) Do the Blind Literally “See” in Their Dreams? A Critique of a Recent Claim That They Do. [Online] Available from: https://www2.ucsc.edu/dreams/Library/kerr_2004.html [Accessed 24 March 2018].
  22. KLS Foundation. (2018) What is KLS?. [Online] Available from: https://klsfoundation.org/what-is-kleine-levin-syndrome/ [Accessed 24 March 2018].
  23. Guinness World Records. (2014) Largest sleepover/pyjama party. [Online] Available from: http://www.guinnessworldrecords.com/world-records/largest-sleepoverpyjama-party [Accessed 24 March 2018].
  24. Adams, C. (2012) Why Does Z Stand for Snoring?. [Online] Available from: https://www.washingtoncitypaper.com/columns/straight-dope/article/13042858/why-does-z-stand-for-snoring-and-how-do-other [Accessed 24 March 2018].
  25. Millard, E. (2017) Can Eating Cheese Really Give You Nightmares?. [Online] Available from: https://www.menshealth.com/health/does-eating-cheese-cause-nightmares [Accessed 24 March 2018].
  26. Wang, H.C. (2015) SiOWfa15: Science in Our World: Certainty and Controversy. [Online] Available from: https://sites.psu.edu/siowfa15/2015/09/16/can-we-sneeze-while-sleeping/ [Accessed 24 March 2018].
  27. Boness, L. (2012) Can humans sneeze while sleeping?. [Online] Available from: http://scienceillustrated.com.au/blog/science/ask-us-can-humans-sneeze-while-sleeping/ [Accessed 24 March 2018].
  28. Only In Your State. (2015) These 8 Crazy Laws In North Dakota Will Leave You Scratching Your Head In Wonder. [Online] Available from: http://www.onlyinyourstate.com/north-dakota/crazy-laws-in-north-dakota/ [Accessed 24 March 2018].
  29. Wikipedia. (2018) David Rice Atchison. [Online] Available from: https://en.wikipedia.org/wiki/David_Rice_Atchison#%22President_for_One_Day%22 [Accessed 24 March 2018].
  30. Koala Preservation Society Australia. (2013) FAQ. [Online] Available from: http://www.koalahospital.org.au/education/koala-faqs [Accessed 24 March 2018].
  31. World Animal Foundation. (2018) Cats. [Online] Available from: https://www.worldanimalfoundation.com/companions/cats/ [Accessed 24 March 2018].