足底部機械受容器への刺激が随意的姿勢制御能力に及ぼす影響

抄録

This study is aimed at investigating the effect of stimulating sole mechanoreceptors on voluntary posture control ability by evaluating the maximum movement distance of COP (center of foot pressure) and the tracking error. The participants comprised 62 male students (175.6±4.0cm, 77.4±7.4kg, 19.8±1.4yrs). They were required to be barefoot, and had to step on three kinds of flooring (namely natural grass, sand, and carpet) at a speed of 110 bpm for 3 minutes. Two tests were conducted to evaluate voluntary posture control ability.

The experimental conditions were randomly chosen for each subject. There were two trials for each test, the results of which were recorded. The better result between the two trials was analyzed as a representative value. Statistical analysis was performed by a paired two-factor analysis of variance (sole stimulation x test), and the significance level was set to 5%.

The paired two-factor analysis of variance indicated that there was no interaction (F (2,366) = 0.88, p = 0.42), and the test factors (F (2,366) = 1.14, p = 0.29) and stimulus condition factors. No significant difference was observed. Therefore, it is suggested that the stimulation induced by stepping on natural grass or sand does not improve voluntary posture control ability.