練習方法の違いによる立位での目標追跡課題への影響

運動学習

The application of motor learning is important for the rehabilitation of patients with motor disorders. Although the exercise method of motor learning consists of constant exercise, variable exercise or both, these methods have not yet been verified adequately with regard to the postural control during standing. To investigate the effect of different exercises with visual feed-back information on postural control, we examined the motor performance with regard to the center of pressure (COP) during the standing target-tracking task in six healthy young males. The visual feed-back information of COP from the force plate was provided to subjects by the monitor display. Subjects were asked to move their body in a forward or backward direction to fit and track their own projected COP to the target on the display. The constant exercise group had a scale with the same rate between the COP displacement on the force plate and the COP displacement displayed in the monitor, and the variable exercise group had two scales with different rates. The retention tests were performed after completing the exercises, on the following day, and one week later. The COP data acquired during the tracking task in retention tests were measured, and the gain, the root-mean-square error (RMSE) and the phase shift for the tracking target were computed. In comparison to the constant exercise group, the motor performance of the variable exercise group was better and maintained these effects for a week after the exercise. The findings of this study suggest that differences in exercise methods affect motor performance and/or the retention of motor performance, and that the application of variable exercise for balance training may therefore be beneficial for fall prevention.