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.
good amount of sleep would be somewhere between 7 to n and that's the current recommendation that's the recommendation by many health organizations including here in the US which is the CDC they recommend or they stipulate a minimum of 7 hours for the average adult
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after about 16 hours of wakefulness we need about an 8 hourish and it's 7 to n hours is the recommendation
somewhere between 7 to9 for the average adult
we've constantly been speaking about in our discussions how much sleep does a person need what's the optimal amount and we're speaking about somewhere between seven to nine hours when i say that i'm talking about seven to nine hours of sleep not time in bed where you might lose 10 to 15 of it right
And they seem to sleep what we now think of as a natural amount, which is somewhere between, if you look at the distribution, seven to nine hours.
While sleep requirements change depending on stages of development and can vary from person to person, adults generally require seven to nine hours of uninterrupted sleep per night.
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.