其他标题：Respiro-Circulatory Functions of Japanese Adult Men and Middle-Long Distance Runners during Maximal Bicycle Work : with Special Reference to Heart Volume
其他摘要：Although it is a well known fact that the heart volume is a key factor of stroke volume, cardiac output and maximal oxygen intake, the available data are not sufficient for further discussion on basic training of endurance. Work was given to the subjects on a bicycle ergometer with the load progressively increasing up to nearly maximal level. The subjects all males, were ordinary healthy 33 adults and trained 33 middle and long distance runners. Cardiac volume was determined by a simplified Rohrer-Kahlstorf method. To determine the cardiac output, CO_2 method was used. To determine the pulmonary diffusing capacity, Filley's steady state method was used. For oxygen intake, Douglas bag method was adopted with Scholander's apparatus. The results were as follows : (1) The heart volume at standing posture was observed to be 648.1 and 835.1 ml. in ordinary and trained subjects, respectively. (2) In ordinary subjects, a close relationship was found between the heart volume and the maximal oxygen intake, the maximal pulmonary diffusing capacity, the maximal cardiac output and the maximal stroke vilume with a correlation coefficient of r=0.443, r=0.274, r=0.572, r=0.535 in the same order. (3) The regression equations for these relationships were as follows : Y^^^=0.002X+1.33 (Y^^^=max Vo_2, X=H. V.) Y^^^=0.027X+26.22 (Y^^^=max Dlo_2, X=H. V.) Y^^^=0.015X+11.84 (Y^^^=max Q, X=H. V.) Y^^^=0.092X+59.86 (Y^^^=max S.V., X=H. V.) (4) The H.V. of the athletes had significantly high correlations to maxVo_2, maxDLo_2, max Q, max S.V. with the coefficient of r=0.668, r=0.449, r=0.680, r=0.670 respectively. (5) The regression equations for these relationships were as follows : Y^^^=0.0027X+1.14 (Y=max Vo_2, X=H. V.) Y^^^=0.045X+ 16.04 (Y=max Dlo_2, X=H. V.) Y^^^=0.015X+13.73 (Y=max Q, X=H. V.) Y^^^= 0.06X+ 93.3 (Y=max S.V., X=H. V.)
