長村, 昌彦

齋藤, 初恵

OSAMURA, Masahiko

SAITO, Hatsue

[ABSTRACT] The present study was undertaken to investigate the effect of a basketball lesson under high temperature environment on the interrelationship between the body weight loss and the fluctuation of heart rate. The Ninety-five male students who selected basketball as the regular course of physical education were used as the subjects. The temperature during this experiment was 31.2 °C, on average. The results obtained in this study were as follows, 1) The average body weight loss induced by a series of exercise was 0.75±0.27 kg (1.16±0.44%), with the significant differences (p<0.05). The number of students who reduced 500g of body weight was the most, and then it was observed comparatively more from 700 g to 1 kg of body weight loss. The maximal loss was 1.4 kg and the minimum was 0.2 kg. The number of students who reduced 1.4% of body weight was the most, and then continued as the order of 0.7%, 0.8%, 1.5% and 1.6%. The maximal loss was 2.3% and the minimal loss was 0.3%. 2) The heart rate at rest(before starting) was 76.07±10.52 beats/min. A significant difference of heart rate was not observed between after warming-up and after each game. The largest heart rate was 180 beats/min. 3) The heart rate immediately after the 1st squat thrust exercise(ST1) was 121.55±16.79 beats/min, with significant difference(p<0.05) compared with heart rate at rest. After the second squat thrust exercise(ST2), heart rate increased to be 148.71±15.58 beats/min, which was higher than that after ST1 with significant difference(p<0.005). Relative increments of heart rate compared with that at rest increased to be 161.90±27.07% after ST1 and 199.10±33.61% after ST2, with significant differences(p<0.05). 4) The correlation coefficient was 0.4871 between body weight loss(%) and the ratio of heart rate increment after STD compared with that at rest, with significance (p<0.001).