심장 박동수를 통하여 관찰한 몇몇 신체운동의 분석

Abstract

Sports activities of freely moving 6 male medical students (19. 9-21. 6 years) were analysed through telemetered heart rate. First, heart rate versus oxygen consumption were plotted on a semi-logarithmic scale and resulted in a straight line. Next, heart rate only was determined during the free sports activity and corresponding oxygen consumption was determined from the heart rate-oxygen consumption diagram. The following results were obtained. 1. The coefficient of correlation between heart rate and oxygen consumption was r=0.94 on a semilogarithmic plot. The regression equation was: log Voz(liter)=0.0079xHeart rate(beat/min)-I-l.97. 2. Heart rate versus lung ventilation diagram on a semi-logarithmic plot showed a straight line and the coefficient of correlation was r=O. 96. The following regression equation was obtained. log VE(liter)=O. 0085x Heart rate (beat/min) +3.33. 3. The relation between oxygen intake and ventilation showed an inflection at the point corresponding 2.0 l/min of oxygen intake and 48 l/min of lung ventilation. 4. Oxygen pulse was: 3.89 ml/beat in resting, 5. 59 in standing, 7. 56 in family gymnastics, 16. 3 in the Harvard step test, and 13. 9 ml/beat in the treadmill test(maximal oxygen intake). 5. Telemetered heart rate in the freely moving muscular activities were as follows: 122 beat/min in table tennis, 1-13 beats in catch ball, 139 beats in tossing of volley ball, 119 beats in 50 meter dash, 155 beats in 100 meter dash, 116 beats in 35 staircase up movement, 130 beats in 72 staircase up movement, 99 beats in 35 staircase down movement, and 100 beats/min in 72 staircase down movement. The maximal heart rate was 195 beat/min. 6. Oxygen consumptions in sports activities were read from the logV0 2-heart rate diagram substituting the telemetered heart rate value. 7. Sports activities were assessed in relation to the maximal oxygen uptake. Ratios of oxygen uptake of sports activities to the maximal oxygen uptake were: standing: O. 19, staircase down movement: 0.21, staircase up movement: 0.28 (35 staircases) and 0.36 (72 staircases), table tennis: 0.33, family gymnastics: O. 44, tossing of volley ball: O. 43, catch ball: 0.47, 50 meter dash: O. 51, and 100 meter dash: O. 57. Assessed on the resting oxygen intake basis. the order of severity of muscular activities was the same as on the maximal oxygen intake basis with only one exception. On this basis 72 staircase up movement was more severe than the table tennis,