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Individual baseline differences outweigh personal traits in short-term heat acclimation adaptations

Lisa Klous et al.

Ergonomics2026https://doi.org/10.1080/00140139.2025.2595643article
AJG 3
Weight
0.50

What the paper says

Previous studies found individual variations during long-term heat acclimation, for short-term heat acclimation (STHA), this remains unclear. This study aimed to examine the impact of individual characteristics on thermophysiological adaptations during STHA. Forty-six service members participated in an STHA protocol in 35.1 ± 0.4 °C and 50 ± 4% RH. Gastrointestinal temperature (Tgi), mean skin temperature (Tsk), heart rate (HR), whole-body sweat loss, and subjective scores were recorded and analysed using mixed-effect modelling. Both end-of and change-during fixed work-rate Tgi, Tsk, and HR showed a decline from day 1 to 5 (p ≤ 0.011). Subjective scores improved (p ≤ 0.005). Fat percentage, body surface area-to-mass ratio, body mass, sex, and age showed relationships (p ≤ 0.05) with one or more outcome measures. STHA results in physiological and subjective benefits, although most of the variance remains unexplained by the recorded characteristics. No individual- or group-level time interactions were found during STHA, indicating the military population adapted uniformly to heat.

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https://doi.org/https://doi.org/10.1080/00140139.2025.2595643

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@article{lisa2026,
  title        = {{Individual baseline differences outweigh personal traits in short-term heat acclimation adaptations}},
  author       = {Lisa Klous et al.},
  journal      = {Ergonomics},
  year         = {2026},
  doi          = {https://doi.org/https://doi.org/10.1080/00140139.2025.2595643},
}

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Evidence weight

0.50

Balanced mode · F 0.40 / M 0.15 / V 0.05 / R 0.40

F · citation impact0.50 × 0.4 = 0.20
M · momentum0.50 × 0.15 = 0.07
V · venue signal0.50 × 0.05 = 0.03
R · text relevance †0.50 × 0.4 = 0.20

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