筋力トレーニングにおける運動リズムと筋内酸素濃度との関係

概要

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We examined a relationship between exercise rhythm and changes in relative oxygen saturation level (StO_2) during weight-lifting exercise in human skeletal muscle. Twelve healthy adult men took part in this study. Ten-repetition maximum (10RM) one-arm curl exercise with various rhythms (one repetition in one second: VFC, one repetition in two second: FC, one repetition in three seconds: SC and one repetition in four seconds: VSC) were performed by all subjects. The relative StO_2 level, which was measured by near-infrared spectroscopy, and the surface electromyography were detected from muscle bally of biceps brachii. Results showed that at the beginning of the 10RM exercise, gradually decrease of relative StO_2 level was observed. The differences in the slope of StO_2 decrease were not significantly with each rhythm. The minimum StO_2 value of FC was significantly higher than other rhythms. The duration time of anoxic state in exercise and mean range of StO_2 changes in one repetition significantly increased with slow exercise rhythm (VFC<FC<SC and VSC). These results showed that exercise rhythm would not relate with relative StO_2 level decrease. In addition, it was suggested that the slow rhythm of weight lifting exercise would cause a relatively longterm anoxic state and large changes in StO_2 level of one repetition.
2006-03-31