Things that elevate your RHR and wreck your sleep: 1. Late/heavy meals 2. Stress/anxiety 3. Caffeine or other stimulants 4. Intense exercise 5. Alcohol
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.
Things that elevate your RHR and wreck your sleep: 1. Late/heavy meals 2. Stress/anxiety 3. Caffeine or other stimulants 4. Intense exercise 5. Alcohol
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Bookmarking — the dossier-vs-overview split is the right call. Most of the time I want overview; sometimes I want receipts.
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So first I would look to see is there anything chemically in the way? Is there alcohol? Is there medication that you're taking at night that you should be moving earlier in the day for example? I I I actually see this not uncommonly where people have trouble with sleep because a medication that is perfectly acceptable to prescribe in the evening is being taken in the evening. It's just you're sensitive to it in a different way. So I see this a lot. Um so first see if there's something chemical or if you're eating you're eating a metabol a food that's too metabolically active too close to bedtime or you caffeinated too late.
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.