其他摘要：Cardiorespiratory responses to maximal work have been investigated under three different room temperatures (T_<(R)>); 10℃, 20℃ and 30℃, while relative humidity ranged 60-70% during the test period. The subjects were 10 healthy males, ranged in age 19-22 years. All the subjects were tested once at each room temperature (3 experiments for one person). Under a fixed T_<(R)>, the subject took 30 min.-rest and 3 min.-warm up, then exercised on a bicycle ergometer. The work load was initiated by zero and increased by a step of 180 kgm/min up to exhaustion. The results were as follows. (1) The total work done, VO_2max and VE max were not significantly different from one T_<(R)> to another. Regarding the Process of doing work, (2) heart rates at 30℃ were significantly higher than those observed at 20℃ and 10℃ during almost entire process of work. However, (3) heart rates at 20℃ did not significantly exceeded those at 10℃ when doing more work than 80% total work. (4) The higher T_<(R)> elicited the more frequent respiration rate, but no clear temperature differencies were observed in VE and VO_2. (5) Recovery values in the above items have also shown the similar temperature dependency, at least, during 5 minutes following the end of exercise. (6) The relationship between VO_2 (%VO_2 max) and the heart rate levels were shown by regression lines for practical use.
