Buchecker Michael, Wegenkittl Stefan, Stöggl Thomas, Müller Erich
1 University of Salzburg.
2 University of Applied Sciences Salzburg.
Motor Control. 2018 Jan 1;22(1):1-17. doi: 10.1123/mc.2016-0021. Epub 2017 Sep 28.
This study evaluated the amount, and particularly, the structure of variability in postural control accompanying an unstable shoe (US) application. Mediolateral and anterior-posterior center of pressure signals plus electromyographic profiles of the tibialis anterior and gastrocnemius medialis were recorded in 29 asymptomatic men while wearing both US and flat shoes. Statistical analysis included common measures of dispersion as well as sample entropy and largest Lyapunov exponent estimates. Data were compared by two-way repeated-measures analysis of variance. Corresponding main effects of footwear revealed that, in contrast to the flat shoes condition, the US intervention consistently increased center of pressure and electromyographic net fluctuations and rendered the overall system less complex, as reflected by the lower sample entropy and higher Lyapunov exponent values observed throughout. Accordingly, employing US in stance should be functional concerning motor development; however, the greater sensitivity of US users to external perturbations must not be overlooked and warrants further investigation.
本研究评估了使用不稳定鞋（US）时姿势控制的变异性数量，特别是其结构。在29名无症状男性穿着US鞋和平底鞋时，记录了他们的左右和前后压力中心信号以及胫骨前肌和腓肠肌内侧的肌电图。统计分析包括常见的离散度测量以及样本熵和最大Lyapunov指数估计。数据通过双向重复测量方差分析进行比较。鞋类的相应主要效应表明，与平底鞋情况相比，US干预持续增加了压力中心和肌电图的净波动，并使整个系统的复杂性降低，这体现在观察到的较低样本熵和较高Lyapunov指数值上。因此，在站立时使用US对运动发育可能具有功能性；然而，US使用者对外部扰动的更高敏感性不容忽视，值得进一步研究。
