異なるペダル回転数の自転車運動は酸素摂取量の緩成分を検討する有用な運動モデルとなりえるか?

概要

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This study reinvestigated the dffect of muscle fiber recruiment pattern on slow component of pulmanary oxygen uptake (VO_2) for high intensity constant-load cycling exercise with different pedal rates. Seven healty male (23.8±1.8yr, 169.6±3.6cm, 64.8±7.5kg) completed (rpm). Gas exchange was measured breath-by-breath and interpolated to 5-s values. VO_2 kinetics were determined to use the mon-linearly exprnential model. Sureface electromyogrphy (EMG) was obtained by vastus lateralies dureing each exercise and used to analysis integrals of EMG (iEMG) and mean power frepuency (MPF). There were no significant differences in amplitudes of the VO_2 slow component between 60 and 11-rpm cycling exercises. Dureing the 60rpm exercise, but the change was not significant. During 110rpm exercise, no significant changes were observed in the iEMG and MPF response patterns. Furthermore, there were no significant correlation between the amplitude of VO_2 slow component and the changes of iEMG and MPF both pedal rate exercises. The results of this study suggest that the different pedal rate at the same relative intensity dureing heavy constant-load cycling exercise does not provide a useful model for examining the effect of muscle fiber recruitment pattern on the VO_2 slow component.