热适应对关键环境极限和直肠温度变化速度的影响
Timo van den Bogaard1, Lisa Klous2, Rachel M Cottle3
1Department of Human Movement Sciences, Faculty of Behavioural and Movement Sciences, Amsterdam Movement Sciences, Vrije Universiteit van Amsterdam, Amsterdam, The Netherlands.
Journal of applied physiology (Bethesda, Md. : 1985)
|April 7, 2025
概括
在5天内适应热量 (HA) 增加了在热中工作的关键环境极限. 九天的HA之后的恢复减少了暴露在热量中的体温上升速度.
科学领域:
- 环境生理学环境生理学
- 职业健康 职业健康 职业健康
- 运动科学 运动科学
背景情况:
- 热适应 (HA) 对于适应炎热环境至关重要,影响生理反应.
- 了解改善关键环境极限和温度调节所需的HA持续时间对于安全指南至关重要.
研究的目的:
- 量化热适应 (HA) 对临界湿球球体温度 (WBGTcrit) 和直肠温度变化速率 (vTre) 的影响.
- 为了调查这些效应在停止HA协议后是否持续存在.
主要方法:
- 28名参与者被分为HA (n=15) 和对照 (CON; n=13) 组.
- 在HA组接受了5-9天的温湿控制高温治疗方案.
- 热应力测试 (HST) 在HA前,期间和之后进行,以测量WBGTcrit和vTre.
主要成果:
- 在9天后 (30.5 ± 2.0°C),HA增加了WBGTcrit,但在5天后 (28.5 ± 2.4°C) 没有增加.
- 在适应期内,没有观察到HA对vTre的显著影响.
- 与前HA相比,后HA,WBGTcrit和vTre仍然较高,但与基线相比,在HA后4-8天后,vTre的减少被注意到.
结论:
- 需要超过5天的HA才能显著增加WBGTcrit.
- 九天的HA,然后进行充分的恢复,可以降低暴露在热量中的直肠温度变化速度.
- 这些发现支持制定基于证据的热安全职业指南.
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