Exercise and Human Circadian Rhythms: What we Know and What we Need to Know

Abstract

A synopsis of the effects of exercise on the circadian system in nocturnal rodents is followed by a review of the few studies investigating the influence of exercise on the human circadian system. It is premature to make specific recommendations about using exercise to promote synchronization in people because of the lack of information on the best times of exercise, the amounts required, and interactions between nonphotic and photic zeitgebers. (Chronobiology International, 14(2), 221–229, 1997)

Key Words:

• Exercise
• Circadian rhythms
• Nonphotic
• Jet lag
• Shiftwork