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Effects of physical exercise on human circadian rhythms

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Title: Effects of physical exercise on human circadian rhythms
Authors: YAMANAKA, Yujiro Browse this author
HONMA, Ken-ichi Browse this author
HASHIMOTO, Satoko Browse this author
TAKASU, Nana Browse this author
MIYAZAKI, Toshihiko Browse this author
HONMA, Sato Browse this author
Keywords: Circadian rhythm
Entrainment, human
Phase shift
Physical exercise
Issue Date: Oct-2006
Journal Title: Sleep and Biological Rhythms
Volume: 4
Issue: 3
Start Page: 199
End Page: 206
Publisher DOI: 10.1111/j.1479-8425.2006.00234.x
Abstract: Bright light is the principal zeitgeber for the biological clock in mammals, including humans. But there is a line of evidence that non-photic stimuli such as physical activity play an important role in entrainment. Scheduled physical activity, such as wheel and forced treadmill running, has been reported to phase-shift and entrain the circadian rhythm in rodent species. In humans, several studies have reported the phase-shifting effects of physical exercise. A single bout of physical exercise at night was demonstrated to phase-delay the circadian rhythm in plasma melatonin. However, for the entrainment of human circadian rhythm, a phase-advance shift is needed. Previously, we demonstrated that scheduled physical exercise in the waking period facilitated the entrainment of plasma melatonin rhythm to the sleep/wake schedule of 23 h 40 min. This result suggested that timed physical exercise produced phase-advance shifts. A regular physical exercise also facilitated entrainment of the circadian rhythms associated with acute phase-delay shifts of the sleep/wake and light/dark schedule. These findings suggest that physical exercise is useful to adjust the circadian rhythm to external time cues, especially for totally blind people and elderly people.
Rights: The definitive version is available at
Type: article (author version)
Appears in Collections:医学院・医学研究院 (Graduate School of Medicine / Faculty of Medicine) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 山仲 勇二郎

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