The libraryRecovery
Sleep
Nine hours or more a night runs 34% higher death from any cause.
Who it's forAny man running on five hours in the week and catching up on weekends.
The item
Three squares: proven in human trials. Two: a strong signal. One: early human data. Striped: the trials disagree.
Start today
- Set one alarm for every day of the coming week, weekend included.
Why it works
Two systems run it. The brain's master clock sets the body to the outside day, mainly through light, and triggers melatonin release in the evening to signal night. Underneath that, adenosine builds up across waking hours and creates the pressure to sleep. It clears only during sleep itself. That is exactly what caffeine interferes with: it blocks that signal rather than supplying energy. The dose here is duration. Pooled across 79 long-term studies, the death rate is lowest at 7-8 hours a night. Below 7 hours it rises 14%, and at 9 hours or more it rises 34% (Ungvari 2025, PMID 40072785). On the dose curve, the lowest point lands at about 7 hours a day (Yin 2017, PMID 28889101). Below six hours, the rise in death rate becomes linear (Itani 2017, PMID 27743803).
Where it fits
Sleep is a move in 53 protocols. Each one opens the plan it sits in.
- Fix Your Sleep Schedule
- Function on Short Sleep
- Sleep Deeper
- Stop Being Tired All Day
- Fix Your Sleep
- Clear Your Brain Fog
- Do TRT Right
- Focus for Hours
- Raise Your Testosterone Naturally
- Recover Faster From Training
- Stop Binge Eating
- Stop Eating at Night
- Stop Getting Sick All the Time
- Add Healthy Years to Your Life
- Beat the Winter Blues
- Get Control of Your ADHD
- Get Your Sex Drive Back
- Keep the Fat Off
- Keep the Fat Off After GLP-1
- Recover From Burnout
- Stop Your Mood Swings
- Switch Off Your Stress
- Beat Your Afternoon Slump
- Build Habits That Stick
- Control Your Temper
- Lift Your Mood
- Quit Caffeine
- Stop Overthinking
- Build Your First Muscle
- Build Your Social Confidence
- Earn Your Abs
- Get Your Motivation Back
- Jump Higher, Run Faster
- Stay Calm Under Pressure
- Stop Worrying All the Time
- Stop Your Panic Attacks
- Break Through Your Plateau
- Keep Your Muscle on GLP-1
- Learn Faster
- Stop Your Heart Palpitations
- Bring Down Your Blood Sugar
- Lose Fat and Build Muscle
- Stop Forgetting Things
- Raise Your VO2 Max
- Slow Skin Aging
- Look Better
- Raise Your Testosterone and Drive
- Strengthen Your Immune System
- Sharpen Your Focus and Memory
- Build Muscle
- Lose Fat
- Steady Your Mood and Nerves
- Live Longer
What people say
Here is what doctors, influencers and men online say about Sleep, word for word.
Experts
Clinicians, authorities
“Sleep hygiene is essentially the prep work we can do to protect our sleep and ensure that we sleep well”
“most adults require between 7 and 9 hours a night to feel properly refreshed and function at their best the next day”
“do not watch television or use devices, like smartphones, right before going to bed, because the blue light makes you more awake”
Gurus
Podcasts, channels, influencers
“Wake up at the same time each day and go to sleep when you first start to feel sleepy”
“because sleep is the best performance enhancing drug in the world. Get your dose every night”
“Long sleepers—people clocking nine or more hours per night—showed an even larger jump in mortality: 34%.”
Regular people
Forums, reviews, comments
“I have made a point of sleeping by 11pm (with a book of course) and waking at around 7am – and each day I have felt as BRIGHT AS A BUTTON!!”
“After following his recommendations for better sleep, I am finally sleeping better than I’ve ever slept in my life.”
“Even after reading the article, I still believe, in general, more sleep is better for you. I'll continue to strive for 8 hours a night.”
The studies
Every study behind this page.
- Sleep duration and all-cause mortality: a systematic review and meta-analysis of prospective studiesPubMed, PMID 20469800
- Relationship of Sleep Duration With All-Cause Mortality and Cardiovascular Events: A Systematic Review and Dose-Response Meta-Analysis of Prospective Cohort StudiesPubMed, PMID 28889101
- Short sleep duration and health outcomes: a systematic review, meta-analysis, and meta-regressionPubMed, PMID 27743803
- Sleep Disturbance, Sleep Duration, and Inflammation: A Systematic Review and Meta-Analysis of Cohort Studies and Experimental Sleep DeprivationPubMed, PMID 26140821
- Sleep problems and risk of all-cause cognitive decline or dementia: an updated systematic review and meta-analysisPubMed, PMID 31879285
- Imbalanced sleep increases mortality risk by 14-34%: a meta-analysisPubMed, PMID 40072785
Words on this page
- PMID
- A study's ID number in PubMed, the public index of medical research.
Hit seven to eight hours a night. Nine or more isn't a better score.
Emergency: call 911.
I am not a doctor. This is not medical advice. This is self-education. Talk to a physician who has your history before you change anything.