The effect of seasonal heat acclimatization on cool‐seeking behaviour during passive heat stress in young adults
Abstract 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 respon...
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| Format: | Article |
| Language: | English |
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Wiley
2025-07-01
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| Series: | Experimental Physiology |
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| Online Access: | https://doi.org/10.1113/EP091969 |
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| author | Hui Wang Zachary J. Schlader Tze‐Huan Lei Toby Mündel Tatsuro Amano Naoto Fujii Takeshi Nishiyasu James Cotter Narihiko Kondo |
| author_facet | Hui Wang Zachary J. Schlader Tze‐Huan Lei Toby Mündel Tatsuro Amano Naoto Fujii Takeshi Nishiyasu James Cotter Narihiko Kondo |
| author_sort | Hui Wang |
| collection | DOAJ |
| description | Abstract 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. |
| format | Article |
| id | doaj-art-e3795006cef94a96ba0b05d35de57dba |
| institution | Kabale University |
| issn | 0958-0670 1469-445X |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Wiley |
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| series | Experimental Physiology |
| spelling | doaj-art-e3795006cef94a96ba0b05d35de57dba2025-08-20T03:28:13ZengWileyExperimental Physiology0958-06701469-445X2025-07-011107992100410.1113/EP091969The effect of seasonal heat acclimatization on cool‐seeking behaviour during passive heat stress in young adultsHui Wang0Zachary J. Schlader1Tze‐Huan Lei2Toby Mündel3Tatsuro Amano4Naoto Fujii5Takeshi Nishiyasu6James Cotter7Narihiko Kondo8Laboratory for Applied Human Physiology, Graduate School of Human Development and Environment Kobe University Kobe JapanDepartment of Kinesiology Indiana University School of Public Health Bloomington Indiana USACollege of Physical Education Hubei Normal University Huangshi ChinaDepartment of Kinesiology Brock University St. Catharines ON CanadaFaculty of Education Niigata University Niigata JapanInstitute of Health and Sports Science University of Tsukuba Tsukuba JapanInstitute of Health and Sports Science University of Tsukuba Tsukuba JapanSchool of Physical Education, Sport and Exercise Sciences University of Otago Dunedin New ZealandLaboratory for Applied Human Physiology, Graduate School of Human Development and Environment Kobe University Kobe JapanAbstract 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.https://doi.org/10.1113/EP091969behavioural thermoregulationelectric fanpassive heat stressseasonal heat acclimatization |
| spellingShingle | Hui Wang Zachary J. Schlader Tze‐Huan Lei Toby Mündel Tatsuro Amano Naoto Fujii Takeshi Nishiyasu James Cotter Narihiko Kondo The effect of seasonal heat acclimatization on cool‐seeking behaviour during passive heat stress in young adults Experimental Physiology behavioural thermoregulation electric fan passive heat stress seasonal heat acclimatization |
| title | The effect of seasonal heat acclimatization on cool‐seeking behaviour during passive heat stress in young adults |
| title_full | The effect of seasonal heat acclimatization on cool‐seeking behaviour during passive heat stress in young adults |
| title_fullStr | The effect of seasonal heat acclimatization on cool‐seeking behaviour during passive heat stress in young adults |
| title_full_unstemmed | The effect of seasonal heat acclimatization on cool‐seeking behaviour during passive heat stress in young adults |
| title_short | The effect of seasonal heat acclimatization on cool‐seeking behaviour during passive heat stress in young adults |
| title_sort | effect of seasonal heat acclimatization on cool seeking behaviour during passive heat stress in young adults |
| topic | behavioural thermoregulation electric fan passive heat stress seasonal heat acclimatization |
| url | https://doi.org/10.1113/EP091969 |
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