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内蒙古自治区呼和浩特市赛罕区大学西街235号 邮编: 010021
作者机构:Univ Cent Arkansas Dept Kinesiol & Phys Educ Conway AR 72035 USA Univ Pittsburgh Dept Hlth & Phys Act Pittsburgh PA USA Western Kentucky Univ Dept Kinesiol Recreat & Sport Bowling Green KY 42101 USA Univ Pittsburgh Dept Emergency Med Emergency Responder Human Performance Lab Pittsburgh PA USA
出 版 物:《EUROPEAN JOURNAL OF APPLIED PHYSIOLOGY》 (欧洲应用生理学与职业生理学杂志)
年 卷 期:2012年第112卷第6期
页 面:2025-2034页
核心收录:
学科分类:0710[理学-生物学] 0403[教育学-体育学] 07[理学] 071003[理学-生理学]
基 金:Federal Emergency Management Agency National Center for Research Resources (NCRR), a component of the National Institutes of Health (NIH) [UL1 RR024153] NIH Roadmap for Medical Research
主 题:Firefighter Perceptual heat strain Hyperthermia Thermal protective clothing Thermoregulation
摘 要:Fire suppression and rescue is a physiologically demanding occupation due to extreme external heat as well as the physical and thermal burden of the protective garments. These conditions challenge body temperature homeostasis and results in heat stress. Accurate field assessment of core temperature is complex and unreliable. The present investigation developed a perceptually based hyperthermia metric to measure physiologic exertional heat strain during treadmill exercise. Sixty-five (28.9 +/- A 6.8 years) female ( = 11) and male ( = 54) firefighters and non-firefighting volunteers participated in four related exertional heat stress investigations performing treadmill exercise in a heated room while wearing thermal protective clothing. Body core temperature, perceived exertion, and thermal sensation were assessed at baseline, 20-mins exercise, and at termination. Perceived exertion increased from baseline (0.24 +/- A 0.42) to termination (7.43 +/- A 1.86). Thermal sensation increased from baseline (1.78 +/- A 0.77) to termination (4.50 +/- A 0.68). Perceived exertion and thermal sensation were measured concurrently with body core temperature to develop a two-dimensional graphical representation of three exertional heat strain zones representative of a range of mean body core temperature responses such that low risk (green) incorporated 36.0-37.4A degrees C, moderate risk (yellow) incorporated 37.5-37.9A degrees C, and high risk (red) incorporated 38.0 to greater than 40.5A degrees C. The perceptual hyperthermia index (PHI) may provide a quick and easy momentary assessment of the level of risk for exertional heat stress for firefighters engaged in fire suppression that may be beneficial in high-risk environments that threaten the lives of firefighters.