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Cited by 40Thermoregulation and physiological responsesSleep and Wakefulness ResearchSleep and related disorders

Influence of repeated passive body heating on subsequent night sleep in humans

Di Nisi, J., Ehrhart, J., Galeou, M., Libert, J. P.·1989·European Journal of Applied Physiology and Occupational Physiology
DOI 10.1007/bf02396592
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Abstract

Experiments were carried out on four healthy male subjects in two separate sessions: (a) A baseline period of two consecutive nights, one spent at thermoneutrality [operative temperature (To) = 30 degrees C, dew-point temperature (Tdp) = 7 degrees C, air velocity (Va) = 0.2 m.s-1] and the other in hot condition (To = 35 degrees C, Tdp = 7 degrees C, Va = 0.2 m.s-1). During the day, the subjects lived in their normal housing and were engaged in their usual activities. (b) An acclimation period of seven consecutive daily heat exposures from 1400 to 1700 hours (To = 44 degrees C, Tdp = 29 degrees C, Va = 0.3 m.s-1). During each night, the subjects slept in thermoneutral or in hot conditions. The sleep measurements were: EEG from two sites, EOG from both eyes, EMG and EKG. Esophageal and ten skin temperatures were recorded continuously during the night. In the nocturnal hot conditions, a sweat collection capsule recorded the sweat gland activity in the different sleep stages. Results showed that passive body heating had no significant effect on the sleep structure of subsequent nights at thermoneutrality. In contrast, during nights at To = 35 degrees C an effect of daily heat exposure was observed on sleep. During the 2nd night of the heat acclimation period, sleep was more restless and less efficient than during the baseline night. The rapid eye movement sleep duration was reduced, while the rate of transient activation phases observed in sleep stage 2 increased significantly. On the 7th night, stage 4 sleep increased (+68%) over values observed during the baseline night.(ABSTRACT TRUNCATED AT 250 WORDS)

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  • Body heating activates heat dissipation for a duration that outlasts the heat stress, and consequently may keep skin blood flow higher for a few hours.

    “Body heating activates heat dissipation for a duration that outlasts the heat stress, and consequently may keep skin blood flow higher for a few hours.”

    From Sleep, vigilance, and thermosensitivity (2012) · cites this paper as [20]

  • This sleep enhancement seems to occur mostly when the heat stress is annihilated, i.e., core temperature is no longer elevated, while skin temperature is still somewhat increased due to the overshoot in heat dissipation.

    “It is important to note that this sleep enhancement seems to occur mostly when the heat stress is annihilated, i.e., core temperature is no longer elevated, while skin temperature is still somewhat increased due to the overshoot in heat dissipation [10, 11, 20, 23–25, 40, 41, 44, 45, 76].”

    From Sleep, vigilance, and thermosensitivity (2012) · cites this paper as [20]

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Authors
Di Nisi, J., Ehrhart, J., Galeou, M., & Libert, J. P.
Affiliations
Centre National de la Recherche Scientifique (FR)
ORCID
Libert, J. P.
Venue
European Journal of Applied Physiology and Occupational Physiology
Publisher
Springer Science and Business Media LLC
Published
1989-09
Volume
59
Issue
1-2
Pages
138-145
ISSN
  • 0020-9376 (ISSN-L)
  • 0301-5548
  • 1439-6327
DOI
10.1007/bf02396592
OpenAlex
W1997654685
Cited by
40
References
26
Citations by year
2026: 1 · 2025: 3 · 2024: 1 · 2021: 3 · 2020: 1 · 2019: 1 · 2018: 1 · 2017: 1 · 2015: 1 · 2013: 2 · 2012: 1
FWCI
0.52
Type
journal article
Language
en
Open access
closed
Licence
www.springer.com/tdm (tdm)
Locations
  • European Journal of Applied Physiology (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Physiology › Thermoregulation and physiological responses
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Sleep and Wakefulness Research
  • Social Sciences › Psychology › Experimental and Cognitive Psychology › Sleep and related disorders
Keywords
heat acclimation, nocturnal sleep, sleep architecture, thermoneutrality, hot environment, REM sleep, stage 2 sleep, stage 4 sleep, sleep efficiency, skin temperature, esophageal temperature
MeSH terms
Adult, Body Temperature, Hot Temperature, Humans, Male, Sleep, Sleep Stages, Sweating

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