The purpose of this study was to investigate the variations of arch index from static standing to dynamic walking and running; furthermore, the interlimb symmetry was checked in the two populations. A total of eighty male participants were recruited for this study, with forty habitually barefoot and forty habitually shod males, respectively. Arch index (AI) was calculated following the previously established “gold standard” measurement via contact areas recorded from EMED. Repeated measure analysis of variance (ANOVA) was employed to compare the difference between static and dynamic walking and running arch index. Paired-samples -test and symmetry index (SI) were used to investigate the symmetry of the left foot arch index and right foot arch index. It was found that the dynamic arch index was significantly higher than the static arch index in barefoot and shod males, showing an increase from static weight-bearing standing to dynamic walking and running. However, interlimb (right-left) symmetry in the foot arch index was observed in the two populations. Dynamic changes of the arch index may provide implications that need to be considered while designing shoe lasts or insoles. Knowledge of the healthy arch index range reported from this study could also be used as a standard baseline to probe into foot and arch disorders.

中文翻译：

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足和赤足种群足弓指数和跨膜对称性的运动变化。

这项研究的目的是研究从静态站立到动态步行和跑步的足弓指数的变化。此外，在两个群体中检查了交联对称性。总共招募了80名男性参与者进行这项研究，其中分别有40名习惯赤脚的男性和40名习惯穿铁皮的男性。根据先前建立的“金标准”测量结果，通过从EMED记录的接触面积，计算出足弓指数（AI）。重复测量方差分析（ANOVA）用于比较静态和动态步行与跑步足弓指数之间的差异。配对样本-测试和对称指数（SI）用于研究左足弓指数和右足弓指数的对称性。结果发现，动态赤足指数明显高于静态赤足男子和穿鞋的男性，显示出从静态负重站立到动态步行和跑步的增加。但是，在两个人群中观察到足弓指数的左右肢左右对称。足弓指数的动态变化可能提供设计鞋implications或鞋垫时需要考虑的含义。该研究报告的健康足弓指数范围的知识也可以用作探查脚和足弓疾病的标准基线。