There's no single "best" age for sleep, as needs change, but infants and young children generally sleep the most, while older kids and teens need significant amounts too; however, adults (18+) generally sleep the most efficiently in fewer hours (7+), often with better consolidated nighttime sleep than younger children who have fragmented sleep, though the quality of sleep (deep/REM cycles) matures with age, making young children and teens have significant developmental sleep needs.
Kids need even more sleep than adults: Teens (age 13 to 17 years) need to sleep between 8 and 10 hours each night. School-aged children (age 6 to 12 years) need to sleep between 9 and 12 hours each night.
Newborns spend from 16 to 20 hours asleep each day. Between the ages of one and four, total daily sleep time decreases to about 11 or 12 hours. This gradual decline continues through childhood, such that an adolescent will need—though not necessarily get—about nine hours of sleep to function at his or her best.
Generally, babies don't have regular sleep cycles until they are about 6 months old. Newborns sleep about 16 to 17 hours per day. But they may not sleep more than 1 to 2 hours at a time. Most babies don't start sleeping through the night (6 to 8 hours) without waking until they are about 3 months old.
The 3-2-1 bedtime method is a simple sleep hygiene strategy: stop eating 3 hours before bed, stop working 2 hours before bed, and stop using screens (phones, tablets, TVs) 1 hour before sleep, helping your body transition to rest by reducing stimulants and digestive load for better sleep quality. A more detailed version adds 10 hours (no caffeine) and 0 (no snoozing) for a 10-3-2-1-0 rule.
The koala is the animal that sleeps approximately 90% of the day (20-22 hours), a necessity due to its low-energy eucalyptus diet requiring intensive digestion, making it the ultimate champion of sleep in the animal kingdom, followed closely by sloths and bats.
SIDS is less common after 8 months of age, but parents and caregivers should continue to follow safe sleep practices to reduce the risk of SIDS and other sleep-related causes of infant death until baby's first birthday. More than 90% of all SIDS deaths occur before 6 months of age.
The first three months with your baby often seem the hardest. Sleep-deprived parents can feel overwhelmed, but that is normal and you will quickly learn how to read your baby's cues and personality. Don't worry about “spoiling” your baby at this stage.
The "9-Minute Rule" for kids, or the 9-Minute Theory, suggests parents focus on three crucial 3-minute windows daily for meaningful connection: right after waking, right after school/daycare, and right before bed, creating security and happiness by being present and distraction-free during these transition times, according to neuroscientist Jaak Panksepp's ideas. It's about quality over quantity, easing parent guilt by highlighting key moments to foster strong parent-child bonds and emotional well-being, say advocates.
By prioritizing sleep, Gen Zers are enhancing their ability to learn, remember, and problem-solve, which could give them an edge in their studies and future careers, according to Tarry. Physical health also gets a boost from early bedtimes.
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.
Best survival rates were found among those who slept seven hours a night. A group sleeping eight hours was 12% more likely to die within the six year period than those sleeping seven hours, other factors being equal. Even those with as little as five hours lived longer than those with eight hours or more nightly.
The 5-3-3 rule is a baby sleep training method for night weaning and fostering independent sleep, involving a baby sleeping 5 hours, staying awake for 3 (for a feed if needed), then sleeping another 3 hours, and continuing in 3-hour increments, teaching them to self-soothe after the initial long stretch, though it's a flexible guideline, not strict; it aims to create longer stretches for parents while meeting the baby's needs, often used around 4-6 months.
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.
Musk goes to bed around 3 a.m. and gets about 6 hours of sleep every night. Although he's not getting eight hours a night, Musk has upped his sleeping schedule from being nearly nonexistent in the past. In May 2023, Musk told CNBC that he's no longer pulling all-nighters.
Across many nations, the rarest birthdays often fall on major holidays, when fewer births— especially planned ones-are scheduled. Dates like December 25 (Christmas Day), January 1 (New Year's Day), and December 24 consistently rank among the least common.
Big Kids and Tweens (8 to 9 Years)
It makes sense: This is the age when children's brains and bodies begin to change. Puberty typically starts as early as age 8 for girls and age 9 for boys. 7 As a result, kids this age often feel torn between the little-kid and big-kid worlds.
Infants are at the highest risk for SIDS during their first 6 months of life. Most SIDS deaths occur when babies are between 1 and 4 months of age.
Risk factors for SIDS include:
However, it can happen wherever your baby is sleeping, such as when in a pushchair or even in your arms. It can also happen sometimes when your baby isn't sleeping – some babies have died in the middle of a feed.
Among the most rested countries surveyed by Sleep Cycle, an app that tracks how much shuteye people are getting, New Zealand comes top with the average Kiwi clocking up in excess of 7.5 hours per night. Finland, the Netherlands, Australia, the UK and Belgium all rank highly for sleep, too, with Ireland close behind.
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.