Body Temperature and Chronotype
The article rejects moral superiority between waking early and waking late, emphasizing biological alignment instead. Warm hands and feet support sleep onset, while cold extremities can make falling asleep harder. Human body temperature us…
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The article rejects moral superiority between waking early and waking late, emphasizing biological alignment instead. Warm hands and feet support sleep onset, while cold extremities can make falling asleep harder. Human body temperature usually reaches its nightly low point within a few hours around 4 AM. Nightly body temperature is described as a useful circadian and sleep signal. Temperature rhythms can help identify chronotype and align sleep timing with biology.