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Effects of thermal environment on sleep and circadian rhythm

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Okamoto-Mizuno, Kazue, Mizuno, Koh·2012·Journal of Physiological Anthropology

Abstract

The thermal environment is one of the most important factors that can affect human sleep. The stereotypical effects of heat or cold exposure are increased wakefulness and decreased rapid eye movement sleep and slow wave sleep. These effects of the thermal environment on sleep stages are strongly linked to thermoregulation, which affects the mechanism regulating sleep. The effects on sleep stages also differ depending on the use of bedding and/or clothing. In semi-nude subjects, sleep stages are more affected by cold exposure than heat exposure. In real-life situations where bedding and clothing are used, heat exposure increases wakefulness and decreases slow wave sleep and rapid eye movement sleep. Humid heat exposure further increases thermal load during sleep and affects sleep stages and thermoregulation. On the other hand, cold exposure does not affect sleep stages, though the use of beddings and clothing during sleep is critical in supporting thermoregulation and sleep in cold exposure. However, cold exposure affects cardiac autonomic response during sleep without affecting sleep stages and subjective sensations. These results indicate that the impact of cold exposure may be greater than that of heat exposure in real-life situations; thus, further studies are warranted that consider the effect of cold exposure on sleep and other physiological parameters.

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Metadata

Authors
Okamoto-Mizuno, K., & Mizuno, K.
Venue
Journal of Physiological Anthropology
Published
2012-05-31
Volume
31
Issue
1
Pages
14-14
ISSN
  • 1880-6791 (ISSN-L)
  • 1880-6805
OpenAlex
W2113296374
Cited by
488
References
11
FWCI
5.09
Type
journal article
Language
en
Open access
gold
Licence
creativecommons.org/licenses/by/2.0 (tdm)

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