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The number of hours after a workout your body temperature dips, a benefit which experts believe may help you fall asleep more easily.
"Your body shuts down faster if you've exercised because it needs sleep to repair workout-induced muscle damage [that's how you get stronger] and replenish your energy," says Mark Stibich, Ph.D., a health research consultant at Columbia University. To reap the benefits of better sleep, move your morning workout to be later in the day (within 6 hours of bedtime).
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