여자에 있어 등산운동의 생리학적 분석

Abstract

Physiological analysis of the physical exercise of mountain climbing in 8 women was made. The course between two places (256 and 516 meters altitude) was 1,300 meters in distance and the difference of vertical height was 260 meters making a mean grade of 20%. In the field , the heart rates during uphill or downhill walk were recorded on magnetic tapes by means of EKG FM radio-telemetry. In the laboratory. oxygen consumption was obtained by the recorded heart rates. using individual heart rate Vs oxygen consumption diagram obtained by treadmill tests. The following results were obtained 1. Uphill walk time was 35. 5 minutes. and during this period the mean heart rate was 168.8 beats/min and the peak heart rate was 186.0 beats/min. The total heart beats during the uphill walk was 5.992 beats. 2. The ratio of individual mean heart rate during the uphill walk to the maximal heart rate distributed between 83.7% and 101.4%. and the mean of the total group was 89.8%. The ratio of peak heart rate of uphill walk to the maximal heart rate was 99.1%. Thus a uphill walk of a 20% grade mountain course was an exhaustive exercise. 3. Oxygen consumption during uphill walk was 36.7 (ranged between 29.5 and 45.6) ml/min/kg. and the ratio of this to the resting oxygen consumption was 9.7. The peak value of oxygen consump• tion during uphill walk was 42.6 ml/min/kg and the ratio of this to the resting oxygen consumption was 11.2 4. Breathing frequency during uphill walk was - 264- 36. l/min and the peak frequency was 41. 6/min. 5. Energy expenditure during uphill walk showed a mean of 9.4 kcal/min and the peak expenditure rate was 10. 9 kca l/min. The total energy expenditure during 35. 5 minutes of uphill walk was 332. 7 kcal. 6. In downhill walk, the time was 28. 2 minutes, mean heart rate was 134.6 (ranged hetween 117.5 and 146.7 beats/min, and the peak heart rate was 143.3 beats/min. The ratio of mean heart rate to the maximal heart rate was 71.5%. Total heart beats during the downhill walk was 3,839 beats Oxygen consumption during the downhill walk was 26.2 ml/min/kg and the ratio of this to the resting oxygen consumptIOn was 6.6. The rate of energy expenditure was 6.5 kcal/min, and the total energy expenditure during the 28.2 minutes of downhill walk was 184.8 kcal Thus the grand total enerμy expenditure during the 63.7 minutes of up' and downhill walk was 517. 5 kcal.