my sleep quality is determined by my resting heart rate before bed. If I'm between 39-44 bpm, I'll have a perfect night's sleep. If I'm 50+, I'll lose some meaningful amount of sleep quality (20-40%).
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.
my sleep quality is determined by my resting heart rate before bed. If I'm between 39-44 bpm, I'll have a perfect night's sleep. If I'm 50+, I'll lose some meaningful amount of sleep quality (20-40%).
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44 bpm was my resting heart rate just before doing to sleep last night. It gave me a perfect night's sleep.
Measure your resting heart rate before bed. After years of working to master high quality sleep, my RHR before bed is the single strongest predictor of whether I'll get high quality or low quality sleep. Eating earlier will lower your RHR at bedtime.
Sleeping heart rate is 47-50 bpm, most influenced by the last time I ate and total daily calories.
The lower my resting heart rate, the better I sleep. The higher my resting heart rate, the worse my sleep.
The lower the heart rate, the better the sleep.
+ eat hours before bed + wind down routine 42 bpm and perfect sleep awaits.
Last night, it was 40 bpm. Guaranteed a perfect night's sleep.
It's remarkable how reliable RHR is in predicting sleep quality.
If my RHR is 55-57, I'll lose 30-35% sleep quality.
Eating earlier and lighter is an excellent cultural shift. It lowers your resting heart rate before bed and improves sleep quality.
the earlier I eat the better my sleep so I would encourage all of you to trial that eat earlier
First my resting heart rate became my best predictor of how well I would sleep so when it was between 46 and 50 I was almost guaranteed a perfect night sleep when I ate later in the day my resting heart rate would be increased to 55 56 57 and when I saw that it was guaranteed to about 30% less quality it is absolutely predictable
I bet you can drop your heart rate by 20 to 30% Before going to bed Yeah Okay When you do that your sleep is going to probably increase by 30 to 40% In quality
And so my lesson from Tuesday uh in eating later is I would rather go hungry and miss out on some calories for the day than I would try to pick up the calories later in the day
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.