The effect of seasonal heat acclimatization on cool-seeking behaviour during passive heat stress in young adults.
behavioural thermoregulation
electric fan
passive heat stress
seasonal heat acclimatization
Journal
Experimental physiology
ISSN: 1469-445X
Titre abrégé: Exp Physiol
Pays: England
ID NLM: 9002940
Informations de publication
Date de publication:
09 Sep 2024
09 Sep 2024
Historique:
received:
18
04
2024
accepted:
31
07
2024
medline:
10
9
2024
pubmed:
10
9
2024
entrez:
10
9
2024
Statut:
aheadofprint
Résumé
Seasonal heat acclimatization is known to enhance autonomic thermoeffector responses, whereas the behavioural response following seasonal heat acclimatization remains unknown. We investigated whether seasonal heat acclimatization would alter autonomic and behavioural thermoregulatory responses. Sixteen healthy participants (eight males and eight females) underwent two trials involving 50 min of lower-leg passive heating (lower-leg submersion in 42°C water) with (Fan trial) and without (No fan trial) the voluntary use of a fan in a moderate thermal environment (27°C, 50% relative humidity) across winter and summer months. In Fan trials, participants were allowed to use a fan to maintain thermal comfort, but this was not allowed in the No fan trials. Cool-seeking behaviour was initiated at a lower change in rectal temperature [mean (SD): 0.21 (0.18)°C vs. 0.11 (0.13)°C, P = 0.0327] and change in mean skin temperature [2.34 (0.56)°C vs. 1.81 (0.32)°C, P < 0.0001], and cooling time was longer [16.46 (5.62) vs. 20.40 (4.87) min, P = 0.0224] in summer compared with winter. However, thermal perception was not modified by season during lower-leg passive heating (all P > 0.0864). Furthermore, rectal temperature was higher in summer (P = 0.0433), whereas mean body temperature and skin temperature were not different (all P > 0.0631) between the two seasons in Fan trials. In conclusion, seasonal heat acclimatization enhanced the cool-seeking behaviour from winter to summer.
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Subventions
Organisme : Kobe University JST (Japan Science and Technology Agency) SPRING
ID : JPMJSP2148
Informations de copyright
© 2024 The Authors. Experimental Physiology published by John Wiley & Sons Ltd on behalf of The Physiological Society.
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