Anywhere between 20 minutes to 90 minutes. Sometimes we like to use a 90 minute window so that the participant can have a full cycle of sleep, and therefore they get both non REM and REM sleep within that time period.
The headline is broadly defensible, but the qualifications matter. Effect sizes vary by population, the strongest claims rest on shorter trials, and credible voices push back on how it's typically framed.
Anywhere between 20 minutes to 90 minutes. Sometimes we like to use a 90 minute window so that the participant can have a full cycle of sleep, and therefore they get both non REM and REM sleep within that time period.
Every Sunday: the week’s new conflicts and verdict changes — and nothing else.
Native comments, Twitter mentions, and Reddit threads about this claim — surfaced together so the conversation isn't fragmented across platforms.
Bookmarking — the dossier-vs-overview split is the right call. Most of the time I want overview; sometimes I want receipts.
Would love a "what would change this verdict" RSS feed. Sign me up if it exists.
what we know broadly about the architecture of sleep is that as you go on throughout the night the percentage of REM sleep increases and every one of your sleep cycles which vary from around 70 to 90 minutes perhaps but that as you sleep throughout the night REM increases and non-rem decreases broadly speaking
10 minutes of bright outdoor light within the first hour of waking anchors the circadian phase and improves sleep onset that night.
Morning sunlight exposure shifts the cortisol awakening response forward, improving daytime alertness.
Long-term morning sunlight reduces age-related macular degeneration risk.
Sleep regularity predicts all-cause mortality more strongly than sleep duration.
Tracking deep sleep on a wearable accurately reflects EEG-measured slow-wave sleep.
Caffeine has a half-life long enough that consumption after 2pm measurably degrades deep sleep in slow metabolizers.