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.
some people, they wake up from naps feeling really groggy, that's probably because they're not sleeping as well as they should at night or as long as they should at night, and so they're dropping into REM sleep or deeper forms of sleep in the day time, and then they wake up and they feel kind of disoriented
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.
I would say that if you are feeling groggy and not alert and awake at 11 11:30 depending on your chronotype I would use that as probably the better metric of my daytime sleepiness
Some people, they wake up from naps, feeling really groggy. That's probably because they're not sleeping as well as they should at night or as long as they should at night. And so they're dropping into REM sleep or deeper forms of sleep in the daytime.
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.