其他摘要：It was the purpose of this study to present the maximal aerobic work capacity of adlescents in urban district (Tokyo) in comparison with that of rural adolescents. The subjects, 175 males (9-22 yrs.) and 188 females (9-20 yrs.), were healthy but not specially trained. Maximal oxygen intake (V^^.O_2 max) was determined by the ground running method; running for one minute to exhaustion following 200-600 meters jogging at the speed of 3.0-3.4 m/sec. 1) In male V^^.0_2 max remarkably increased with age up to 20 yrs. to the plateau value of about 3.5 l/min, and in female it increased with age up to 15 yrs. To the peak value of 2.0l/min, which then tended to decrease slightly. V^^.O_2 max in female adults (over 2O yrs.) was about 60% of that of male adults. V^^.O_2 max was acceleratedly increased at the ages of 9-13yrs. in female and 12-16 yrs. in male. Namely the acceleration of V^^.O_2 max appeared about three years earlier in female than in male. During the acceleration period of four years, V^^.O_2 max increased 1.0 l/min in male and 0.5 l/min in female. 2) V^^.O_2 max/kg bodyweight increased with age in 11-l6 yrs. male subjects, reaching the plateau value of 56.6ml at the age of 16yrs. In female, it decreased with age from 10 to 19yrs., namely from 44.2-36.0ml to 36.0 ml, which is about 70% of that of male adults. 3) Correlation between V^^.O_2 max and body weight was highly significant in male groups of 10-13 yrs., and in female groups of 13-15 yrs. The body of these ages may probably be considered as a fat-free body mass. Correlation between V^^.O_2 max and maximal running distance was quite high in 9-22 yrs. male subjects (r = 0.777 ; P<0.001) and low in female subjects. 4) In female subjects older than l4 yrs, V^^.O_2 max was 10 to 20% higher in rural district (Utsunomiya, by Yoshizawa) than in urban district (Tokyo and Nagoya, by Matsui). In male subjects of 10-15 yrs. and in female subjects of 10-17 yrs., V^^.O_2 max/kg was 7-10% and 9-20% higher respectively in rural district (Utsunomiya, by Yoshizawa) than in urban district (Tokyo). Moreover, in males of 12-15 yrs. and in females of 12-16 yrs, V^^.O_2 max/kg was 7-18% and 11-18% higher in rural than in urban district (Nagoya, by Matsui).
