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

抄録

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%VO₂ max separated by 10-s recovery. Before and after training period, VO₂ max and maximal accumulated O₂ deficit (MAOD) were determined as indices of metabolic capacity. During 30s-lasting exhaustive exercise, VO₂, O₂ deficit, and circulatory parameters, such as heart rate, stroke volume, and cardiac output, were also determined every 10s. After the training, VO₂ 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 VO₂ and O₂ 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.