2022 年 Annual60 巻 Proc 号 p. 318-321
Abstract: In our previous study, low-frequency, short-duration high-intensity interval training (HIIT) was performed for 8-12 weeks in untrained healthy subjects (Once a week, 3 sets, less than 10 minutes total training time), and the results showed that regardless of training intensity, maximal oxygen uptake (VO2max) and exhaustion time during maximal exercise increased by 6-13% and 33-89%. However, it is not clear whether similar results can be obtained in athletes who perform strenuous exercise on a daily basis. The purpose of this study was to investigate the effects of HIIT at different intensities on cardiorespiratory function and exercise performance during maximal exercise in college athletes. The subjects were 13 male college student athletes. The training was determined for each individual using a ramp exercise test to determine the maximum load, divided into 80% (TG80%) or 90% (TG90%) intensity training groups. and conducted once a week for 8 weeks. The training consisted of three bouts of exercises to volitional fatigue at TG80% and TG90% maximum work rate. Regardless different of training intensity, increased VO2max (TG80%: +11%, TG90%: +12%) and maximal work rate during the ramp exercise test (TG80%: +13%, TG90%: +16%) in both groups were observed after HIIT (P <0.01). Maximal exhaustion time during the HIIT (TG80%: +110%, TG90%: +95%) was also significantly prolonged in both groups after training (P < 0.05). In conclusion, low-frequency for short-duration once a week HIIT improves cardiorespiratory function and exercise performance during maximal exercise for athletes, regardless of its training intensity. These findings will contribute to the development of new and optimal exercise programs for various age groups and people, even competitive athletes.
