動的身体適応力のトレーニングと評価に関する予備的検討

抄録

The present study considers human body as a multi-degree-of-freedom complex system, and applied slackline (a balance training using flat belt fixed and tensioned between two anchor points) to young healthy subjects to improve the Dynamic Embodied Adaptability (an ability to stabilize and organize system itself quickly and flexibly coordinating its components against dynamic changes of its environment or itself). Although some previous studies investigated the effect of slacklining training, they applied only static measures such as trajectory length of the center of pressure (COP). In the current preliminary study, four subjects participated in our preliminary experiment consisted of once-a-week balance training (two 20 minutes sessions) with slackline for four weeks. The postural balance ability was evaluated by static and dynamic measures (COP trajectory length and DFA scaling exponent, a nonlinear time series analysis method quantifying flexibility/adaptability of biological system). As a result, our hypothesis, that DFA scaling exponent would approach to 1 (i.e., flexibility/adaptability of COP dynamics would increase), was not supported nor any common tendency among subjects were not observed. We should reconsider our experimental design, training program and balance indexes and collect more data to examine our hypothesis statistically in the future study.