Shvartz E, Shibolet S, Meroz A, Magazanik A, Shapiro Y
J Appl Physiol Respir Environ Exerc Physiol. 1977 Oct;43(4):684-8. doi: 10.1152/jappl.1977.43.4.684.
To determine if heat tolerance could be predicted from responses to exercise in temperature conditions, 51 young men performed 15 min of bench stepping at an average work load of 80 W at 23 degrees C. On the following day they attempted to perform 3 h of bench stepping at 40 W in heat (39.3 degrees C dry bulb, 30.3 degrees C wet bulb). Of these subjects, 4 were heat intolerant, judged by previous heat stroke episodes during field marches, 12 were heat acclimated, and 35 were unacclimated. The heat-intolerant subjects showed the highest heart rates (HR) and rectal temperatures (Tre) at 23 degrees C and in heat, and the acclimated subjects showed the lowest corresponding values. HR and Tre in each environment were combined into a single score, from 10, indicating the poorest responses, to 100, indicating the best responses. These scores at 23 degrees C when correlated with the corresponding scores in heat resulted in a linear correlation coefficient of r = 0.94 with a standard error of estimate of 8.6%. Scores of the heat-intolerant subjects were below 35, and those of the acclimated subjects were between 70 and 100. Thus heat tolerance can accurately be predicted for HR and Tre responses to exercise at room temperature.
为了确定是否可以根据在温度条件下的运动反应来预测耐热性，51名年轻男性在23摄氏度下以平均80瓦的工作负荷进行了15分钟的台阶试验。第二天，他们试图在高温环境（干球温度39.3摄氏度，湿球温度30.3摄氏度）下以40瓦的负荷进行3小时的台阶试验。在这些受试者中，根据以往野外行军期间的中暑发作情况判断，有4人不耐热，12人经过热适应，35人未经过热适应。不耐热的受试者在23摄氏度和高温环境下心率（HR）和直肠温度（Tre）最高，而经过热适应的受试者相应值最低。将每个环境中的HR和Tre合并为一个分数，从10分（表示最差反应）到100分（表示最佳反应）。23摄氏度时的这些分数与高温环境下的相应分数相关，得到线性相关系数r = 0.94，估计标准误差为8.6%。不耐热受试者的分数低于35分，经过热适应的受试者分数在70到100分之间。因此，对于室温下运动时的HR和Tre反应，可以准确预测耐热性。
