体力负荷对高温耐力的影响

Effect of Physical Loads on Tolerance to High Temperature

本文研究了环境温度为27～50℃,相对湿度50～75%,中等强度以下体力负荷时机体生理反应特点。探讨了高温耐力与体力负荷、环境温、湿度的关系。结果表明在环境温湿度、体力负荷综合作用下,直肠温度和皮肤温度升高的幅度存在着差异,此差异决定丁机体与环境热交换的数量和性质。机体高温耐受时间随环境温湿度、体力负荷应激的增加而缩短。并将该种关系拟合了数学模型,此模型可预测环境温度40～50℃,相对湿度50～75%、中等强度以下体力负荷时机体高温耐受时间。

The paper describes the characteristics of human physiologicalresponses to physical loads of moderate or less intensity under theenvironmental temperature 27-50℃ and relative humidity 50-75%and the relationship of tolerance to high temperature with physicalload,environmental temperature and humidity.The results showedthat there were differences in increase of rectal and skin temper-fature under the multiple effects of environmental temperatureand humidity and physical load The differences decided the quan-tity and quality of heat exchange between body and environment.Time and tolerance to high temperature was shortened with increaseof physical load and environmental temperature and humidity.Amathematical model was established for the relationship.The modelcould predict time of body tolerance to high temperature underthe coanditions of physical load.less than moderate level,environ-mental temperature 40-50℃ and relative humidity 50-75%.