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《JOURNAL OF HYGIENE RESEARCH》 1998-06
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Heat Strain for Personnel Wearing Three Levels of Protective Ensembles at Moderate and Heavy Workloads

Ding Songtao,Pan Chaorong,Zhu Xiansen,Xiao Xuan (Institute of Chemical Defense,Beijing\ 100083,China)  
The effects of individual protective ensembles and workloads on personnel's physiological heat strain were experienced by personnel in a hot environment (35℃,55% relative humidity).Six young males performed treadmill tests at both moderate (ML:1 11m/s,5% grade) and heavy (HL:1 34m/s,5% grade) workloads.They weared three levels of protective ensembles:protective mask only (PM),protective clothing only(PC),and full protective ensembles(FP).Tests lasted 60min and 45min,respectively,for ML and HL.Physiological measurements included heart rate(HR),rectal (T re ) and skin(T sk ) temperature,sweat rate(SR),and sweat evaporative rate(ER).Differences between the ensembles and the workloads were significant for HR responses.The increase rate in T re and T sk ,and SR,ER were siginficantly reduced from PM and PC to FP condition during ML and Hl tests. The sweat evaporation restriction of ensembles and the increase of heat production from execise are the main factors of enhancing the heat strain.
【Fund】: 国防科工委科研基金
【CateGory Index】: R339.5,R136.3
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