Kuhlemeier K V, Miller J M, Dukes-Dobos F N, Jensen R
J Appl Physiol Respir Environ Exerc Physiol. 1977 Aug;43(2):347-51. doi: 10.1152/jappl.1977.43.2.347.
The prescriptive zone is the range of climates in which man's body temperature is independent of climatic conditions. The environmental temperatures which define the upper limit of the prescriptive zone (ULPZ) at different work rates were determined in 46 clothed, healthy, male industrial workers; some of the men were job acclimated to heat and some were not. They performed a total of 653 work bouts of low, medium, or high intensity in environments ranging from 11 to 35 degrees C corrected effective temperature (CET) (8-37 degrees C wet bulb globe temperature). Heart rates (HR) and rectal temperatures (Tre) were measured after 1 h of work. The ULPZ was calculated from Tre data. HR's showed a similar pattern of response as Tre's except that the inflection point corresponding to the ULPZ occurred at different environmental temperatures at most of the experiment conditions. About one-third of the work bouts were performed in the summer months and the remainder in the winter. The ULPZ decreased with increasing work rates. At high, but not low, work rates, men who were exposed to heat in the performance of their jobs were more heat tolerant than men who were not heat acclimatized. Both groups were found to be more heat tolerant in the summer months than in the winter.
规定区域是指人体体温不受气候条件影响的气候范围。在46名身着衣物、健康的男性产业工人中，测定了不同工作强度下界定规定区域上限（ULPZ）的环境温度；其中一些男性对热环境有工作适应性，一些则没有。他们在有效温度校正后为11至35摄氏度（湿球黑球温度为8至37摄氏度）的环境中，总共进行了653次低、中、高强度的工作回合。工作1小时后测量心率（HR）和直肠温度（Tre）。根据Tre数据计算ULPZ。HR的反应模式与Tre相似，只是在大多数实验条件下，对应ULPZ的拐点出现在不同的环境温度下。约三分之一的工作回合在夏季进行，其余在冬季。ULPZ随工作强度增加而降低。在高强度而非低强度工作时，工作中接触热环境的男性比未适应热环境的男性更耐热。两组在夏季都比冬季更耐热。
