The longest medically verified continuous sleep is difficult to pinpoint due to conditions, but UK hypnotist Peter Powers reportedly slept for eight days (192 hours) under hypnosis, while a 7-year-old, Wyatt Shaw, once slept for eleven days (264 hours), a medically documented case of extreme hypersomnia. While sleep deprivation records are well-known (Randy Gardner, 11 days awake), actual extended sleep is often due to rare disorders like Kleine-Levin Syndrome (KLS) or Hypersomnia, causing days or weeks of sleep.
The Guinness World Records office has confirmed that eleven days is the record for the lengthiest period of continuous sleep.
The koala is famous for sleeping around 20-22 hours a day, which is about 90% of the day, due to their low-energy diet of eucalyptus leaves that requires extensive digestion. Other extremely sleepy animals include the sloth (up to 20 hours) and the brown bat (around 20 hours), with some snakes like the ball python also sleeping up to 23 hours daily.
Sleep needs can vary from person to person, but in general, experts recommend that healthy adults get an average of 7 to 9 hours per night of shuteye. If you regularly need more than 8 or 9 hours of sleep per night to feel rested, it might be a sign of an sleep or medical problem, Gamaldo says.
Sleeping 20 hours is abnormal and typically symptomatic. It carries immediate cognitive and physical effects and, if recurrent, increases risk for metabolic, cardiovascular, mood, and cognitive problems. Prompt evaluation and treatment of underlying causes are appropriate.
Einstein slept nearly 10 hours a day. He was known to be a firm believer in the importance of a good night's sleep, often aiming for around 10 hours of rest. However, his approach to sleep was somewhat unconventional.
In 2012, at 17 years old, Delien started to bring awareness to KLS by appearing in a number of media events to provide a real-life example of the syndrome. The syndrome causes Delien to sleep for 18–19 hours a day on average and to sleep for longer stretches of time as well, including a 64-day block of time in 2012.
Gen Z stays up late due to a combination of technology (blue light, endless content), significant stress and anxiety (FOMO, financial/global worries), biological shifts (natural teenage circadian rhythm), and "revenge bedtime procrastination," where they sacrifice sleep for personal time, often in bed, scrolling social media. This digital-heavy, high-stress lifestyle creates overstimulation and a misalignment with natural sleep patterns, leading to chronic sleep deprivation, notes the American Academy of Sleep Medicine and the Sleep Health Foundation.
Older adults need about the same amount of sleep as all adults — seven to nine hours each night.
On average, Japanese sleep about 7 hours and 20 minutes a night, - the least among 33 OECD member countries. And the number of insomniacs is growing. But even as more people suffer from insomnia, help can be hard to find.
Yes, the Navy SEAL sleep trick (an 8-minute power nap with elevated legs) is a real technique for quick rest, popularized by former SEAL Jocko Willink, that helps improve alertness and reduce fatigue, though its effectiveness depends on individual relaxation skills and it's not a substitute for full nighttime sleep. The method involves lying down, elevating your feet above your heart (on a chair or couch), relaxing facial muscles, dropping shoulders, and clearing your mind for about 8-10 minutes to promote relaxation and blood flow, preventing grogginess.
The answer is “probably.” Research has shown that many animals experience a sleep phase similar to humans known as REM (Rapid Eye Movement) sleep, which is closely associated with dreaming. This phase is characterized by increased brain activity and is when most vivid dreams occur.
Cory Cavin holds the record for the fastest time to fall asleep on stage during a live performance. He achieved this unique feat in 17 minutes and 50 seconds. Cavin set the record at a RecordSetter LIVE!
Another study suggested that performance begins to degrade after 16 hours awake, and 21 hours awake was equivalent to a blood alcohol content of 0.08 percent, which is the blood alcohol limit for drunk driving in Canada, the U.S., and the U.K.
Specifically, sleeping on the side or back is considered more beneficial than sleeping on the stomach. In either of these positions, it's easier to keep your spine supported and balanced, which relieves pressure and enables your muscles to relax and recover.
The 3-2-1 sleep rule is a simple wind-down routine: stop eating and drinking alcohol 3 hours before bed, stop working/mentally stimulating activities 2 hours before, and turn off screens (phones, TVs) 1 hour before sleep, helping you transition to rest by reducing stimulants and preparing your mind and body. It's often part of a larger 10-3-2-1-0 rule, which also adds no caffeine 10 hours prior and no hitting snooze (0) in the morning.
A study done by UCLA researchers discovered that just a single night of insufficient sleep can make an older adults' cells age quicker. This might not seem like a big deal, but it has the potential to bring on a lot of other diseases. Multiple sclerosis, heart disease and cancer are just a few of them.
The prevalence of napping in older adults ranges from 20% to 60% in different studies, but has been consistently reported to be higher than in other age groups.
Whilst boomers and millennials may use the 😂 emoji, this has long since been deemed 'uncool' (or 'cheugy') by Gen Z. Instead, this has been replaced by the skull (💀) or the crying emoji (😭), dramatising the idea of 'dying with laughter'.
Some evidence suggests that high IQ is associated with later sleep patterns. However, it is unclear whether the relationship between IQ and later sleep is due to biological or social effects, such as the timing of working hours.
Across much of the world, it is no longer middle-aged adults who are the most miserable. Instead, young people, especially Gen Z, are reporting the highest levels of unhappiness of any age group.
Regardless of how severe your symptoms or how long you've been experiencing them, you should seek help at an urgent care clinic if insomnia or sleep deprivation are negatively impacting your quality of life. But there are also things you can do at home that may help you get better sleep.
Ellen Sadler, born in 1859 in Turville, England, became known as the "Sleeping Girl" after falling into a mysterious nine-year sleep starting March 17, 1871, at age 11.
Why? “Teenagers are going through a second developmental stage of cognitive maturation,” explains Crocetti. Additional sleep supports their developing brain, as well as physical growth spurts.