Differences in rearfoot, midfoot, and forefoot kinematics of normal foot and flatfoot during running
Differences in rearfoot, midfoot, and forefoot kinematics of normal foot and flatfoot during running
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正常足与扁平足跑步时后足、中足、前足运动学的差异
作者：
Takabayashi T;Edama M;Inai T;Kubo M.
扁平足是一种常见的足部畸形，它可能导致跑步损伤，如胫骨内侧应力综合征。步行过程中扁平足的足内运动学经常被记录使用多节足模型。然而，尽管扁平足和跑步损伤之间可能存在联系，但跑步过程中扁平足的足内运动学仍不清楚。我们的目的是阐明正常足和扁平足参与者跑步时的后足、中足和前足运动学。正常足（n= 14）和扁平足（n= 14）的参与者被要求以他们喜欢的速度跑过地面。基于Rizzoli足部模型计算跑步过程中后足、中足和前足的三维运动学。进行了统计参数映射的双样本检验，以确定跑步期间正常足和扁平足之间足内运动学时间历程的差异。各组之间的特征和时空参数无差异。在前足后角，与正常足相比，扁平足的外翻显著增加，从24%增加到100%（p<0.001）。在中足角度，与正常足相比，扁平足的外翻显著增加，从0%增加到4%（p<0.049），从21%增加到100%（p<0.001）。在前足角度，与正常足相比，在扁平足中观察到显著增加的内翻从6%增加到17%（p<0.047）。这些发现可能有助于解释为什么扁平足会导致跑步损伤，如胫骨内侧应力综合征。
Flatfoot is a common foot deformity, which could contribute to running injuries such as medial tibial stress syndrome. Intrafoot kinematics of flatfoot during walking have often been documented using multisegment foot models. However, the intrafoot kinematics of flatfoot during running remains unclear, despite the possible relationship between flatfoot and running injuries. We aimed to clarify rearfoot, midfoot, and forefoot kinematics when running in participants with normal foot and flatfoot. Participants with the normal foot (n= 14) and flatfoot (n= 14) were asked to runover‐ground at their preferred speed. Three‐dimensional kinematics of the rearfoot, midfoot, and forefoot during running were calculated based on the Rizzoli foot model. A two‐samplet‐test of statistical parametric mapping was performed to determine differences between normal foot and flatfoot in time histories of intrafoot kinematics during running. No differences were found between groups in characteristics and spatiotemporal parameters. In the frontal rearfoot angle, a significantly increased eversion from 24% to 100% (p< .001) was observed in the flatfoot compared to the normal foot. At the midfoot angle, a significantly increased eversion from 0% to 4% (p< .049) and 21% to 100% (p< .001) was observed in the flatfoot compared to the normal foot. At the forefoot angle, a significantly increased inversion from 6% to 17% (p< .047) was observed in the flatfoot compared to the normal foot. These findings may be useful to explain why flatfoot could contribute to running injuries such as medial tibial stress syndrome.
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