Sakate T
J Hum Ergol (Tokyo). 1978 Dec;7(2):127-34.
Measurements were taken in ten healthy young male subjects, ages 20 to 25, under air temperature conditions of 5, 20, 35, and 50 degrees C. The relative humidity was maintained at 50% throughout all the air temperature conditions. Maximum work loads were obtained by treadmills. The first work load was 95 m/min 0 degrees grade; this was increased by 1 degree every one minute until the subjects reached a self-imposed maximum. The heart rate and expired air sample during the last 30 sec work was used for statistical analyses. The analysis of variance confirmed a significance effect of air temperature factor in the cases of the endurance time until the exhaustion, maximal oxygen uptake, maximal carbon dioxide production, heart rate, respiratory exchange ratio, and oxygen pulse. The regression analyses disclosed the following relationships between maximal oxygen uptake (VO2 max) or heart rate (HR) and air temperature: VO2 max = 2472 + 29.5Ta-0.6Ta2(ml. STPD), HR = 173 + 2.0Ta-0.09Ta2 + 0.001Ta3, where Ta shows air temperature in centigrade. The physiological mechanism underlying the changes in maximal oxygen uptake in heat is discussed.
对10名年龄在20至25岁之间的健康年轻男性受试者进行了测量，测量时的气温条件分别为5℃、20℃、35℃和50℃。在所有气温条件下，相对湿度均保持在50%。通过跑步机获得最大工作量。第一个工作量是速度为95米/分钟、坡度为0度；此后每分钟坡度增加1度，直到受试者达到自行设定的最大值。将最后30秒工作期间的心率和呼出气体样本用于统计分析。方差分析证实，在耐力时间直至耗尽、最大摄氧量、最大二氧化碳产生量、心率、呼吸交换率和氧脉搏的情况下，气温因素具有显著影响。回归分析揭示了最大摄氧量（VO2 max）或心率（HR）与气温之间的以下关系：VO2 max = 2472 + 29.5Ta - 0.6Ta2（毫升，标准温度和压力干气），HR = 173 + 2.0Ta - 0.09Ta2 + 0.001Ta3，其中Ta表示摄氏度的气温。文中讨论了热环境中最大摄氧量变化的生理机制。
