核心温度和心率在规范区的上限处
Thomas E Bernard1, Candi D Ashley2, S Tony Wolf3
1College of Public Health, University of South Florida, Tampa, FL, USA.
Physiological reports
|September 9, 2023
概括
这项研究调查了工作场所的热压力,发现女性在处方区的上限时体温和心率高于男性. 适应和服装并没有显著影响这些生理反应.
科学领域:
- 职业健康 职业健康 职业健康
- 环境生理学环境生理学
- 人类因素工程 人类因素工程
背景情况:
- 1969年世界卫生组织 (WHO) 的报告旨在将工作场所的热暴露限制在38°C的核心温度 (Tc).
- 这个极限与规范区 (ULPZ) 的上限相对应,这是生理应变的关键值.
研究的目的:
- 分析核心温度 (Tc) 和心率 (HR) 与在ULPZ和以下的代谢率 (MR) 之间的关系.
- 调查性,适应和服装在暴露于热应激期间对生理反应的影响.
主要方法:
- 利用了宾夕法尼亚州立大学 (PSU) 和南佛罗里达大学 (USF) 进行的研究中的渐进热应激协议数据.
- 采用回归模型来确定代谢率 (MR) 和性别与核心温度 (Tc) 和心率 (HR) 的关联.
主要成果:
- 在ULPZ内,女性在同一MR中表现出比男性更高的Tc和HR,这表明相对生理需求更大.
- 适应状态和服装类型对Tc或HR没有显著影响.
- 核心温度 (Tc) 在ULPZ以下保持相对稳定,而随着暴露接近ULPZ,心率 (HR) 增加.
结论:
- ULPZ代表了一个重要的生理值,在两性之间观察到不同的反应.
- 研究结果强调,在工作场所的热应激管理策略中,需要考虑性别特异性的生理差异.
- 已确定的38°C核心温度极限是男性在高代谢率 (490W) 的情况下接近的,在降低代谢负荷的情况下温度较低.
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