Mutual influence of sleep and circadian clocks on physiology and cognition

“The 24-hour sleep-wake cycle is one of the most prominent outputs of the circadian clock systems (Heyde et al., 2018)”

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Sleep disruption and circadian arrhythmia induce metabolic, cognitive, and immunological impairments. Is it causal? YES.



Sleep is highly conserved across the animal kingdom, since the dawn of time.

Interesting comparison: unlike hibernation or a coma, sleep is highly reversible. Lots of rebound regulation: lots of wakefulness makes you tired; lots of sleep leads to increased wakefulness.

Studies have shown improved memory performance after naps and extended sleep durations. Imo, you don’t need to go from 6 to 9.5 hours overnight, but keep that “9.5” on your radar.

Diet is easy, just eat like an adult. You can go 10 days without even eating! Try that with sleep. No, don’t try that. Most definitely incompatible with survival. Sleep deprivation impairs cognitive functions.

As a marker of health: cognitive function >>> how many reps you can do at the gym.

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calories proper



It STARTS with Sleep.