Sleep Inertia: Why You Can’t Think for the First Twenty Minutes
Morning grogginess is a measurable brain state with a published timecourse — and it lasts longer than it...
Longevity & Supplement Guides
Evidence-scored guides to supplements, biomarkers, and daily protocols. Written the way we score our products: honestly.
Showing 17 guides tagged “Sleep”.
6.4 to 7.8 Hours: The Sleep Window That Isn’t a Target
A Nature study built 23 biological ageing clocks and found a U-shaped link with sleep duration. The headline...
How REM sleep was discovered — and how it became a number on your wrist
In December 1951 a broke graduate student wired his sleeping eight-year-old son to a machine nobody else wanted,...
Can You Catch Up on Sleep? What Recovery Sleep Actually Repays
The weekend patch is the most widely practised sleep intervention in the world. The evidence says it gives...
Is Yoga Really the Best Exercise for Sleep?
A headline ranking yoga first for sleep is doing the rounds again. Three network meta-analyses have now asked...
Exercise and the Brain's Night Shift: What the Glymphatic Research Actually Says
A review this month put "exercise helps the brain take out the trash" into every feed. The mechanism...
Bedroom Air Quality and Sleep: The Free Variable Nobody Measures
We measure the sleeper in exquisite detail and ignore the sealed room they spend eight hours in. What...
One Number for a Whole Night: What an AI Found in 10,000 Sleep Studies
A new Nature Communications model read the raw signals from more than 10,000 overnight recordings and found a...
The nightcap illusion: what alcohol does to your sleep and recovery
A drink shortens the felt distance to sleep and lengthens the real distance to recovery. What pooled sleep-lab...
The Light You Live In: Bright Days, Dark Nights, and Your Body Clock
The brightness of your days and the darkness of your nights is a longevity lever hiding in plain...
Are Naps Good or Bad? What the Newest Research Actually Says
Two 2026 headlines said opposite things about napping. The research resolves it — and points somewhere more useful:...
The Night Shift: What Deep Sleep Does to Your Body
Scientists just mapped the brain circuit that releases growth hormone during deep sleep. Here is what it means...
