PULMONARY DIFFUSING CAPACITY, PULMONARY MEMBRANE DIFFUSING CAPACITY AND PULMONARY CAPILLARY BLOOD VOLUME AT REST AND DURING EXERCISE / 体力科学

ABSTRACT

Oxygen intake, pulmonary diffusing capacity (DL), pulmonary membrane diffusing capac ity (DM) and pulmonary capillary blood volume (Vc) were measured at rest and during maximal and submaximal work, with Filley's steady state technique on 3 athletes (middle distance runners) and 5 non-athletes. The results obtained in this study were as follows<BR>(1) At rest, DL, DM, Vc in athletes were 28.3±3.7 ml/min/mmHg, 52.2±5.3 ml/min/ mmHg, 124.1±41.8 ml respectively, and in non-athletes were 25.6±1.0 ml/min/mmHg, 47.5±7.5 ml/min/mmHg, 114.7 ± 25.9m1 respectively.<BR>(2) During submaximal works, DL, DM and Vc increased together with oxygen intake. At the same level of VO<SUB>2</SUB> athletes showed greater DL, DM and Vc than those of non-athletes. Contact time exponentially decreased as oxygen intake increased.<BR>(3) At maximal work, athletes showed significantly greater max VO<SUB>2</SUB> DL, DM and Vc than those of non-athletes. But, contact time of athletes was not significantly greater than that of non-athletes.<BR>(4) The results demonstrate that a higher DL, DM and Vc is accompanied by a higher aerobic capacity, a larger ventilatory capacity, and a larger cardiac output.