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Avoid Intense Exercise Late in the Day
Keep intense exercise earlier in the day, and if you need to train later, choose lower-intensity activity instead of hard workouts. The idea is to reduce late-day physiological arousal and body-temperature elevation, which can delay the circadian clock, raise cortisol when it should be lower, and make it harder to fall asleep on time.
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“And for those of you that exercise in the afternoon, understand that if you exercise very intensely, so this might be weight training or running or some other very intense exercise, typically that's going to further increase your body temperature, and it's going to so-called delay your circadian clock.”
huberman · Essentials: Sleep Toolkit for Optimizing Sleep & Sleep-Wake Timing · Jun 11, 2026 · 17:26 · open ↗
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