Cited by 5Circadian rhythm and melatoninSleep and Work-Related FatigueThermoregulation and physiological responses

Human circadian rhythms and exercise: Significance and application in real-life situations

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Mizuno, Koh·2014·The Journal of Physical Fitness and Sports Medicine

Abstract

This review introduces a variety of human circadian rhythms including physiological processes and mental and physical performances, with reference to real-life situations. Circadian rhythms play a role in physiological processes, such as core body temperature and plasma melatonin, which are recognized as the body clock. As humans are diurnal organisms, mental performance declines primarily at night, secondarily in the early afternoon; this is consistent with risks of traffic and industrial accidents. Physical performance is composed of various fitness components and generally reaches its peak and nadir at around evening and early morning, respectively. Exceptions to this are body balance control and accuracy, both of which require brain function. Although maximal oxygen consumption (VO2 max) measured in the laboratory shows a constant value independent of the time of day, actual endurance capacity might be determined by core body temperature at the beginning of exercise, thermoregulatory response, and environmental temperature and humidity, all of which vary with the time of day. As the most powerful factor affecting the human circadian clock is bright light, physical exercise may be one factor entraining the human circadian pacemaker. However, experimental evidence has suggested that exercise itself has little or no influence on shifting the human master clock. Although further studies are required, recent studies have demonstrated that physical exercise at a certain time of day specifically improves physical performance at the same time, which might be independent of the master clock.

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Authors
Mizuno, K.
Affiliations
Tohoku Fukushi University (JP)
Corresponding author
Mizuno, Koh
Venue
The Journal of Physical Fitness and Sports Medicine
Published
2014
Volume
3
Issue
3
Pages
307-315
ISSN
  • 2186-8123 (ISSN-L)
  • 2186-8131
OpenAlex
W2090458100
Cited by
5
References
77
Citations by year
2022: 2 · 2021: 1 · 2020: 1 · 2019: 1
FWCI
0.00
Type
journal article
Language
en
Open access
Locations
  • The Journal of Physical Fitness and Sports Medicine (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Topics
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Circadian rhythm and melatonin
  • Social Sciences › Psychology › Experimental and Cognitive Psychology › Sleep and Work-Related Fatigue
  • Health Sciences › Medicine › Physiology › Thermoregulation and physiological responses
Keywords
circadian rhythm, exercise timing, circadian clock, core body temperature, melatonin, cognitive performance, physical performance, endurance capacity, thermoregulation, bright light, circadian entrainment, traffic accidents, industrial accidents

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