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首页> 外文期刊>International Journal of Occupational Safety and Ergonomics >Physiological and perceptual strain of firefighters during graded exercise to exhaustion at 40 and 10 degrees C
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Physiological and perceptual strain of firefighters during graded exercise to exhaustion at 40 and 10 degrees C

机译：在40℃和10摄氏度耗尽期间消防员的生理和感知菌株

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Purpose. To study whether perceptual identification should be included as a measure to evaluate physiological stress. Methods. Physiological variables oxygen uptake (V-O2), ventilation, heart rate, blood lactate concentration, rectal temperature (T-rec) and mean skin temperature, and perceptual variables rate of perceived exertion, thermal sensation and time to exhaustion, were measured at submaximal and maximal intensities during graded exercise on a treadmill to exhaustion in 12 firefighters wearing protective clothing and extra mass at 40 and 10 degrees C. Physiological strain index (PhSI) and perceptual strain index (PeSI) were calculated. Results. Apart from T-rec, all physiological and perceptual variables were higher at submaximal intensities of 40 degrees C. Time to exhaustion was 16% shorter and the corresponding V-O2 was reduced by 7% in the heat. A high correlation (r = 89) between PhSI and PeSI was found at both temperatures. PeSI scores were equal to PhSI at both ambient temperatures, except at the two highest intensities in the heat, where PeSI was higher. Conclusions. These findings support use of perceptual identification to evaluate physiological stress. However, at very high intensities under hot conditions the perceptual strain was estimated higher than the physiological strain. More precise indexes are needed to include perceptual measures in safety standard.
机译：目的。为了研究感知鉴定是否应作为评估生理压力的措施。方法。生理变量氧吸收（V-O2），通风，心率，血液乳酸浓度，直肠温度（T-R-REC）和平均皮肤温度，并且感知的变量对耗竭，热敏感觉和耗尽时间的感知变量率在潜水中测量在跑步机上进行速度锻炼过程中的最大强度，在12个消防员身上耗尽，佩戴保护衣服和40℃和10℃的额外质量。计算生理应变指数（PHSI）和感知应变指数（PESI）。结果。除了T-R-R-R-R-R-R-R-R-R-R-R-Capximal强度，40摄氏度的所有生理和感知变量较高。耗尽的时间较短，相应的V-O2在热量中减少7％。在两个温度下发现pHSI和Pesi之间的高相关（R = 89）。除了在热量的两个最高强度之外，Pesi评分等于PPSI，其中Pesi更高。结论。这些发现支持使用感知鉴定来评估生理压力。然而，在热条件下在非常高的强度下，感知菌株估计高于生理菌株。需要更精确的指标来包括安全标准的感知措施。

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