足部姿态变化对静态姿势稳定控制的即刻作用

Immediate effect of foot posture variation on the stability of static posture

背景:既往研究表明异常足部的姿态影响人体姿势控制能力,而足部姿态中立化可改善人体姿势控制能力,但机制不明。目的:观察足部姿态中立化后即刻对健康成人静态站立姿势控制能力的影响。方法:健康成人受试者30名,应用足部姿态指数评价足部姿态。测量小腿后足角评价受试者应用非特制足部矫形垫对其足部姿态的中立化的效果。非特质足部矫形垫采用VAS YLI-HowardDananberTM保健系列足部矫形垫。同时评测受试者改变足部姿态前后静态单腿站立姿势控制能力。静态单腿站立姿势控制能力应用电脑平衡仪(ACTIVE BALANCER EAB-100)测试。结果与结论:应用非特制足垫后,足部姿态较前更趋中立化,差异有显著性意义。但单腿站立姿势控制能力没有显著变化。说明应用非特制足部矫形垫后可使轻度旋前的足部姿态中立化,但没有对姿势控制能力产生即刻影响。虽然足部姿态中立化对静态姿势控制具有远期效果,但其机制不单纯为改善足部力线结构,需要进一步的研究。

BACKGROUND：Abnormal foot posture can influence the control capacity of human posture. To normalize the foot posture can improve the postural stability, but the relevant mechanism is unclear. OBJECTIVE：To observe whether normalizing the foot posture could affect the postural control of healthy adults at a static standing position immediately. METHODS：Thirty healthy adults were involved. Postural stability test was done both with and without an unmolded foot orthosis （VASYLI-HowardDananberTM） normalizing the foot posture. The foot posture index （FPI-6） and rearfoot-to-leg angle were measured to measure the foot postures. Postural control capacity was also measure in the subjects standing on one leg before and after foot posture variation by using Active Balancer EAB-100. RESULTS AND CONCLUSION：Foot postures were improved significantly after unmolded foot orthosis intervention. But the postural stabilities were not improved at one-leg standing position. These findings indicate that the unmolded foot orthoses can normalize the foot posture with slight pronation, but have no significant effects on the postural stability. Although to normalize the foot posture has a long-term effect on the control of static postures, the mechanism is not simple to improve the foot structure.