Evidence that heat acclimation training may alter sleep and incidental activity
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<p>This randomized cross-over study tested the hypothesis that heat acclimation training would detrimentally affect sleep variables and alter incidental physical activity compared to a thermoneutral training control condition. Eight recreationally trained males (V̇O<sub>2peak</sub> 49±4.9 mL<sup>.</sup>kg<sup>-1.</sup>min<sup>-1</sup>) completed two separate interventions separated by at least 31 days: 5 consecutive day training blocks of moderate-intensity cycling (60 min·day<sup>-1</sup> at 50% peak power output) in a hot (34.9±0.7 °C and 53±4 % relative humidity) and a temperate (22.2±2.6 °C; 65±8 % relative humidity) environment. Wrist-mounted accelerometers were worn continuously for the length of the training blocks and recorded physical activity, sleep quality and quantity. Data were analysed in a Bayesian framework, with the results presented as the posterior probability that a coefficient was greater or less than zero. Compared to the temperate training environment, heat acclimation impaired sleep efficiency (Pr β<0 =.979) and wake on sleep onset (Pr β>0 =.917). Daily sedentary time was, on average, 35 min longer (Pr β>0 =.973) and light physical activity time 18 min shorter (Pr β>0 =.960) during the heat acclimation period. No differences were observed between conditions in sleep duration, subjective sleep quality, or moderate or vigorous physical activity. These findings may suggest that athletes and coaches need to be cognisant that heat acclimation training may alter sleep quality and increase sedentary behaviour. Highlights Five consecutive days of heat training negatively affected some objective measures of sleep quality and incidental physical activity in recreationally trained athletes. Athletes and coaches need to be aware of the potential unintended consequences of using heat acclimation on sleep behaviours.</p>
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ID Code: | 235313 | ||||||||||||
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Item Type: | Contribution to Journal (Journal Article) | ||||||||||||
Refereed: | Yes | ||||||||||||
ORCID iD: |
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Additional Information: | Funding Statement: Open access funding provided by UiT The Arctic University of Norway (incl University Hospital of North Norway). This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors. | ||||||||||||
Measurements or Duration: | 10 pages | ||||||||||||
DOI: | 10.1080/17461391.2022.2124386 | ||||||||||||
ISSN: | 1746-1391 | ||||||||||||
Pure ID: | 115570753 | ||||||||||||
Divisions: | Current > Research Centres > Centre for Data Science Current > Research Centres > Australian Centre for Health Services Innovation Current > QUT Faculties and Divisions > Faculty of Science Current > Schools > School of Mathematical Sciences Current > QUT Faculties and Divisions > Faculty of Health Current > Schools > School of Exercise & Nutrition Sciences Current > Schools > School of Public Health & Social Work |
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Copyright Owner: | 2022 The Author(s). | ||||||||||||
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Deposited On: | 20 Sep 2022 23:35 | ||||||||||||
Last Modified: | 01 Mar 2024 07:22 |
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