高強度間欠的運動トレーニングが30秒程度で疲労困憊に至る超最大運動時の代謝・循環指標および運動持続時間に及ぼす影響

Abstract

Present study aimed to examine the effects of high-intensity intermittent training on metabolic or circulatory parameters and exercise time during 30s-lasting exhaustive exercise. Six healthy males (22 ± 1yrs) had an intermittent training four days a week for four weeks. The intermittent training consisted of 8 or more sets of 20s exercise bout at an intensity of 170%V 4 O 2 max separated by 10-s recovery. Before and after training period, V 4 O 2 max and maximal accumulated O 2 deficit (MAOD) were determined as indices of metabolic capacity. During 30s-lasting exhaustive exercise, V 4O 2 , O 2 deficit, and circulatory parameters, such as heart rate, stroke volume, and cardiac output, were also determined every 10s. After the training, V 4 O 2 max and MAOD were significantly increased. During 30s-lasting exhaustive exercise, exercise time, stroke volume, and cardiac output were also significantly enhanced. However, no significant differences were observed in V 4 O 2 and O 2 deficit every 10s during 30s-lasting exhaustive exercise. Therefore, these findings suggest that high-intensity intermittent training enhances exercise time during 30s-lasting exhaustive exercise and that the improvement of exercise performance is closely related to an increase in anaerobic capacity.