You sleep roughly one-third of your life, which amounts to about 25 to 30 years if you live to an average age (like 75-90), because most people get around 8 hours of sleep per night (one-third of a day). For a lifespan of 75 years, this is about 25 years; for 90 years, it's closer to 30 years.
How much of our lives is spent sleeping? The average person spends about 26 years sleeping in their life, which equates to 9,496 days or 227,916 hours. That's one-third of our entire lives spent asleep in bed. Surprisingly, we also spend 7 years trying to get to sleep — a total of 33 years or 12,053 days!
The average person spends about 26 years sleeping in their life which equates to 9,490 days or 227,760 hours. That's one third of our entire lives spent asleep in bed!
You spend about one-third of your life sleeping, but it's still something many struggle with. Researchers and experts also struggle with it because of the mysteries surrounding how and why we sleep and what happens to us while we do.
Older adults need about the same amount of sleep as all adults — seven to nine hours each night.
The 40s and 50s
Both fluctuations can result in lower energy levels, feeling lethargic, and less muscle mass. Again, the 40s and 50s impact people differently, with some noticing fewer effects than others. However, during this stage, people will usually notice they're "getting old".
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.
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.
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.
Sleep occurs in stages (from one to four). It is important that we pass through all of these stages. It is hard to say which organ goes to sleep first but we do know that our muscles relax and our heartbeat reduces during the second stage.
The 80/20 Rule means that you stick to your healthy, consistent sleep schedule 80% of the time. You then can make exceptions to your schedule 20% of the time. The 80/20 Rule allows you to “live life” and enjoy those special moments with your family.
People in their 60s are tricky to classify. They are not commonly thought of as young, but they did not get to be really old either. A death in one's 70s is more-or-less accepted as normal, and the 80s are widely considered to be ripe old age and a very full life. Anything much over 90 is insanely successful.
In the early modern era, first and second sleep had generally been of equal duration, approximately three to three and a half hours apiece. But a distinct imbalance began to emerge by the mid-1800s, marked by a gradual expansion of the first phase to five or six hours at the expense of the second.
Key takeaways: A lack of sleep is a top cause of premature aging. Most adults over age 18 need 7 to 9 hours of sleep per night. Getting enough sleep improves concentration and gives your body time to repair and recharge.
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.
But solid evidence still shows that the best way to boost the chance of living a long and active life is to follow the advice you likely heard from your parents: eat well, exercise regularly, get plenty of sleep, and stay away from bad habits.
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'.
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.
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.
Dogs will usually sleep 12-14 hours spread throughout the day, with puppies clocking in even more hours of slumber. In fact, it's not uncommon for a dog to sleep up to 20 hours a day in their first few months of life. Sleep allows the body to recharge and repair, so it's important to let your pet enjoy their downtime.
The longest time a human being has gone without sleep is 11 days and 25 minutes. The world record was set by American 17-year-old Randy Gardner in 1963. When the experiment ended, Gardner had been awake for 264 hours and 25 minutes.
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.
In his piece, he revealed that through his years of research, he's found that rumination is the biggest thing that causes poor sleep. He says that being worried about something at night has affected his own ability to fall asleep.
Signs of poor core sleep (deep, restorative sleep) include waking up foggy, daytime fatigue/energy crashes, poor concentration, irritability, frequent illness, memory issues, and mood swings, indicating your brain and body aren't fully repairing and consolidating memories. You might also experience increased sugar cravings, slow muscle recovery, and a weakened immune system.
The military sleep method involves the following steps: Breathe deeply: Close your eyes and focus on your breathing. Take slow, deep breaths. Relax your face: Slowly relax all the muscles in your face, starting from your forehead and then moving downward over your cheeks, mouth, and jaw.