抄録
The aim of the present study was to examine the availability of IPmax (maximal intermittent power) determined using a new IPmax test as an intensity index for intermittent sprint training. Eight male track and field athletes performed the IPmax test, a submaximal intensity incremental test, a VO2max test, and 2 intermittent sprint training protocols (IST1 and IST2). The IPmax test involved repeated 30-s sprints with 2-min rest intervals, continuing until exhaustion with gradually increasing intensity at each stage. The IPmax derived from the IPmax test was used as the intensity index for the IST1 and the IST2. In the IST1, athletes performed 30-s sprints at 105 %IPmax with 2-min rest intervals until exhaustion. The IST2 consisted of 40-s sprints at 95 %IPmax with 4-min rest intervals until exhaustion. The number of repetitions completed in each IST was recorded. The coefficients of variation for the number of repetitions in each IST were 15.3% and 9.1%, respectively, the 9.1% value being significantly smaller in comparison to previous studies (F = 5.3, p < 0.05). The relative intensity of IPmax in the IPmax test was 179 ± 11 %VO2max, indicating a high intensity level, and was significantly correlated with aerobic capacity (vs. VO2max, r = 0.77, p < 0.01). Based on these results, we conclude that the IPmax obtained in this study represents a high intensity and has a significant relationship with aerobic capacity, suggesting that it is an intensity index that accounts for both anaerobic and aerobic capacities. Furthermore, the use of %IPmax allows for approximate regulation of the exhaustion point during intermittent sprint training, suggesting its availability as an intensity index for such exercises.
