Yes, sleeping less than the recommended 7-9 hours is strongly linked to a shorter life expectancy, even more so than diet or exercise in some studies, by significantly increasing risks for fatal conditions like heart attack, stroke, diabetes, and dementia. Insufficient sleep impairs the body's restorative processes, impacting immune function, toxin flushing from the brain, and memory consolidation, essentially shortening your lifespan.
A good night's sleep is more than a luxury: New research from Oregon Health & Science University suggests that insufficient sleep may shorten your life. The study published today in the journal SLEEP Advances.
Ideally? No. Only getting three hours of sleep in a day can leave you sleep-deprived, which has been linked to various negative outcomes8 for emotional, cognitive, and physical health. These can include a weakened immune system, an increased risk of obesity, memory decline, and more.
Sleep Deprivation Effects
Proactive strategies
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 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.
Having short sleep durations, particularly less than 7 hours per night is associated with increased risk of cardiovascular disease morbidity and mortality.
While every organ in the body is affected by poor sleep, the brain takes the biggest hit, showing signs of dysfunction faster than any other system. Over time, the heart, liver, and immune system also begin to show stress, which can increase your risk of chronic illness.
This is sometimes described as a period of 'quiet wakefulness'. But is taking a quick rest - closing your eyes, putting your feet up and clearing your mind for a couple of minutes - as beneficial as getting some sleep? The concise answer is 'no'.
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.
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.
Poor sleep: Studies show that low quality (or not enough) sleep makes your cells age faster. Stress: When you're stressed, your brain pumps out cortisol, a stress hormone. Cortisol blocks two substances that keep your skin looking plump and vibrant: hyaluronan synthase and collagen.
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.
Sleep deficiency has also been linked to depression, suicide, and risk-taking behavior. Children and teens who are sleep deficient may have problems getting along with others. They may feel angry and impulsive, have mood swings, feel sad or depressed, or lack motivation.
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.
Sleep deprivation decreases the amount of a factor that protects neurons. Not only does a lack of sleep make you feel awful, research has shown it impairs the brain. What's more, sleep loss over long periods can even increase risk for Alzheimer's and other neurological diseases.
Whether you prefer a cold drink or a warm bedtime drink, here's our list of the best drinks before bed to help you drift off.
Chronic sleep deprivation reduces brain performance and increases the risk of severe health issues, including cardiovascular disease, stroke, and diabetes. Experts agree that 5 hours of sleep per day is insufficient and should not be maintained long-term. Aim for 7–8 hours of sleep per night to stay healthy.
According to recently published research involving 172,321 adults, men who get adequate sleep live about five years longer than men who don't. For women, it's two years. However, about a third of adults cut sleep short, raising their risk of heart attack, dementia and diabetes, among other health conditions.
What are signs of sleep deprivation?
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.