The evidence is convergent. Multiple independent sources reach the same conclusion, the underlying mechanism is well-characterized, and even the field's most cautious voices treat it as worth doing.
So the quality piece is important. Also, whether or not you remember your dreams or you don't, you want to make sure that you're getting ample amounts of slow wave sleep, which dominates the first half of your sleep night, and rapid eye movement sleep, which dominates the second half of your sleep night because they have different roles in recovery of brain and body.
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.
the first principle quality measure of sleep is continuity so meaning was your sleep nice and continuous and you didn't wake up many times or was your sleep fragmented and littered with many Awakenings
My expectation is for people to wake up at most once per night. I would like to get you to zero.
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.