Purpose: To investigate the validity and test-retest reliability of high-intensity interval training by heart rate control. Methods: Eleven high school athletes including 7 male (age: height: weight: VO2max:) and 4 female (age: height: weight: VO2max:) participated in this study. Within subject design was used in this study. Subjects should perform incremental running test to evaluate velocity and VO2 of the intensity at 90%VO2max. After incremental running test, subjects performed high-intensity interval training by heart rate control (HIT(subscript HRC): 6 repetitions, 4-min exercise bouts, 2-min rest intervals) twice using the % of age-predicted maximal heart rate which VO2 and velocity of each exercise and rest intervals were recorded every 10 seconds. Each test was separated 24 hours at least. Results: The velocities and VO2 of each exercise bouts were significant correlation (r=0.92 to 0.99, p＜.05) and difference (p＜.05) to velocity and VO2 of the intensity at 90%VO2max that only the VO2 of first bout was no difference to VO2 of the intensity at 90%VO2max. The velocities and VO2 of each exercise bouts were significant correlation (r=0.88 to 0.98, p＜.05) and no significant difference between twice HIT(subscript HRC) (p＞.05). Conclusion: The relative and absolute intensities of exercise bouts during HIT(subscript HRC) were lower than 90%VO2max, but the well validity and test-retest reliability was showed that HIT(subscript HRC) is a reliable training method.
- oxygen uptake
- age-predicted maximal heart rate