Time and environmental conditions for heat stress recovery based on human physiological responses: Developing a predictive model

IF 7.1 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Building and Environment Pub Date : 2024-10-26 DOI:10.1016/j.buildenv.2024.112228

Liangyue Shang , Baizhan Li , Shan Zhou , Chenqiu Du , Runming Yao , Yanfeng Zhu , Guangyi Chen , Peiping Zheng , Hong Liu

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引用次数: 0

Abstract

Breaks can protect workers exposed to high temperatures from heat stress and other health risks. However, the most suitable recovery conditions and how the body physiologically responds to them remain uncertain. The aim of this study was to provide scientific evidence of the human physiological response to step changes in environmental parameters of recovery stage through climate chamber experiments and to develop a predictive model. Volunteer subjects experienced 60 min of walking exercise in air temperatures of 32 and 36 °C, RH 60%, and an air velocity of 0.2 m/s to form two heat stress levels, and then moved into a resting space under designated environmental conditions, such as a standard effective temperature (SET) range of 15.6–26.0 °C. The results showed that the recovery time for physiological parameters decreased with decreasing SET, accompanied by a simultaneous increase in thermal discomfort rate. Correlation analysis suggested that recovery time was related to the physiological stress index at the beginning of the recovery phase (PSI₀; r = 0.86) and the SET (r = 0.75) of the recovery environment. A predictive model of heat stress recovery time was developed based on PSI₀ and SET, with a determination coefficient of 0.9. According to the model, a SET of 18.8–24.9 °C was suitable for people with high heat stress requiring full recovery in 15–30 min. The research findings contribute to the regulation of health and safety in high-temperature working environments and the operation of restroom environmental conditions.

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基于人体生理反应的热应激恢复时间和环境条件：开发预测模型

休息可以保护暴露在高温下的工人免受热应激和其他健康风险的影响。然而，最合适的恢复条件以及人体对这些条件的生理反应仍不确定。本研究的目的是通过气候箱实验为恢复阶段环境参数的阶跃变化提供人体生理反应的科学证据，并建立一个预测模型。自愿受试者在气温为 32 和 36 °C、相对湿度为 60%、气流速度为 0.2 m/s 的环境中进行了 60 分钟的步行运动，形成两个热应激水平，然后在指定的环境条件下（如标准有效温度（SET）范围为 15.6-26.0 °C）进入休息空间。结果表明，生理参数的恢复时间随着标准有效温度的降低而缩短，同时热不适率增加。相关分析表明，恢复时间与恢复阶段开始时的生理应激指数（PSI0；r = 0.86）和恢复环境的 SET（r = 0.75）有关。根据 PSI0 和 SET 建立了热应激恢复时间预测模型，其决定系数为 0.9。根据该模型，18.8-24.9 ° C 的 SET 适合需要在 15-30 分钟内完全恢复的高热应激人群。该研究成果有助于规范高温工作环境中的健康和安全以及洗手间环境条件的操作。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Building and Environment 工程技术-工程：环境

CiteScore

12.50

自引率

23.00%

发文量

1130

审稿时长

27 days

期刊介绍： Building and Environment, an international journal, is dedicated to publishing original research papers, comprehensive review articles, editorials, and short communications in the fields of building science, urban physics, and human interaction with the indoor and outdoor built environment. The journal emphasizes innovative technologies and knowledge verified through measurement and analysis. It covers environmental performance across various spatial scales, from cities and communities to buildings and systems, fostering collaborative, multi-disciplinary research with broader significance.