MECHANISMS OF THERMAL ACCLIMATION TO EXERCISE AND HEAT
MECHANISMS OF THERMAL ACCLIMATION TO EXERCISE AND HEAT
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DOI：
10.1152/jappl.1974.37.4.515
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发表时间：
1974-01-01
影响因子：
3.3
通讯作者：
STOLWIJK, JA
中科院分区：
文献类型：
--
作者：
NADEL, ER;PANDOLF, KB;STOLWIJK, JA
方法6名相对不健康的年轻男性（平均身体特征：身高173 cm，体重72 kg，体表面积1.86 m2，年龄25岁）自愿作为受试者。每名受试者的最大摄氧量（vo 2 111，，）是在5分钟热身后通过自行车测力计上的增量运动测试确定的。通过开路技术利用Beckman顺磁氧分析仪测定氧摄取，在每次测量之前通过大气压变化校准所述Beckman顺磁氧分析仪。在VOW m&x测量后的两天中的每一天，每个受试者进行标准化的汗液敏感性测试（如下所述），以重复测定预适应胸部出汗率-内部温度关系。然后受试者开始在凉爽的环境（T1 = 22 ℃）中连续10天的运动适应。运动适应程序包括每天运动1小时（4个15分钟的回合，间隔5分钟的休息时间）在自行车测力计上的强度，诱导心率在160和170次/分钟之间。这种运动强度对应于70和80%Vo2 mnx之间。随着受试者连续几天变得越来越健康，增加运动强度以将心率维持在规定范围内。
METHODSix relatively unfit young men (mean physical characteristics: ht 173 cm; wt 72 kg; body surface area 1.86 m2; age 25 yr) volunteered as subjects. Each subject had maximum oxygen uptake (vo2 111,,) determined from an incremental exercise test on a bicycle ergometer after a 5-min warm-up. Oxygen uptake was determined by an open circuit technique utilizing a Beckman paramagnetic oxygen analyzer, which was calibrated by means of atmospheric pressure variations prior to each measurement. On each of two days following VOW m&x measurement, each subject underwent a standardized sweat-sensitivity test (described below) for duplicate determination of the preacclimation chest sweating-rate-internal-temperature relationship. Subjects then began 10 consecutive days of exercise acclimation in cool ambience (T,= 22 “C). The exercise acclimation procedure consisted of exercising 1 h per day (four 15-min bouts separated by 5-min rest periods) on a bicycle ergometer at an intensity that induced a heart rate between 160 and 170 beats/min. This exercise intensity corresponded to between 70 and 80% Vo2 mnx. As a subject became increasingly fit on successive days, the exercise intensity was increased to maintain heart rate within the prescribed range.