Habibi Peymaneh, Momeni Reza, Dehghan Habibollah
Department of Occupational Health Engineering, School of Health, Isfahan University of Medical Sciences, Isfahan, Iran.
Department of Engineering Occupational Health, School of Health, Isfahan University of Medical Sciences, Isfahan, Iran.
Int J Prev Med. 2015 Nov 24;6:116. doi: 10.4103/2008-7802.170430. eCollection 2015.
Heat stress is a known occupational hazard, which cause reduced exercise capacity. The purpose of this study was to evaluate the relationship among environmental, physiological, and perceptual heat stress indices in Iranian men.
This analytical study was carried out on 24 healthy men (age 23.34 ± 1.64 years) with normal body weight (body mass indices 21-25 kg/m(2)) in low workload for 120 min under hot climates (22-32°C, 40% relative humidity). Physiological strain index (PSI), wet-bulb globe temperature (WBGT), oral temperature, heart rate (HR), and heat strain score index (HSSI) questionnaires were simultaneous measurements taken at any 5 min during the exposure and resting state the initial measurements.
The results showed that the range of WBGT index was 20.47-31.40°C. Significant correlation were found among WBGT and HSSI (r = 0.995), PSI (r = 0.990), oral temperature (r = 0.991), and HR (r = 0.972) indices. Also, significant correlation were found among HSSI and oral temperature (r = 0.983), HR (r = 0.978), and PSI (r = 0.987).
The results have shown that simultaneous with the increase in valid indices of heat stress such as WBGT and PSI indices, the amount of HSSI has also increased with high power. Therefore, when there is no access to a reliable heat stress method such as WBGT, or PSI indices, HSSI, an observative and subjective heat strain method, can be used as a simple, fast in least 5 min, and inexpensive for evaluating the heat strain in Iranian men.
热应激是一种已知的职业危害，会导致运动能力下降。本研究的目的是评估伊朗男性中环境、生理和感知热应激指标之间的关系。
本分析研究对24名体重正常（体重指数21 - 25 kg/m²）的健康男性（年龄23.34 ± 1.64岁）进行，他们在炎热气候（22 - 32°C，相对湿度40%）下进行低强度工作120分钟。在暴露期间和初始测量的休息状态下，每隔5分钟同时测量生理应变指数（PSI）、湿球黑球温度（WBGT）、口腔温度、心率（HR）和热应激评分指数（HSSI）问卷。
结果显示，WBGT指数范围为20.47 - 31.40°C。发现WBGT与HSSI（r = 0.995）、PSI（r = 0.990）、口腔温度（r = 0.991）和HR（r = 0.972）指数之间存在显著相关性。此外，HSSI与口腔温度（r = 0.983）、HR（r = 0.978）和PSI（r = 0.987）之间也存在显著相关性。
结果表明，随着WBGT和PSI等热应激有效指标的增加，HSSI的数值也显著增加。因此，当无法使用可靠的热应激方法如WBGT或PSI指数时，HSSI这种观察性和主观性的热应激方法可作为一种简单、快速（至少5分钟）且廉价的方法，用于评估伊朗男性的热应激情况。
