Differences in the coordination and its variability among foot joints during running in neutral foot and flatfoot
Differences in the coordination and its variability among foot joints during running in neutral foot and flatfoot
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DOI：
10.1111/sms.14267
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发表时间：
2022-11-15
影响因子：
4.1
通讯作者：
Kubo，Masayoshi
中科院分区：
文献类型：
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作者：
Takabayashi，Tomoya;Edama，Mutsuaki;Kubo，Masayoshi
扁平足是一种常见的足部畸形，在成人中的患病率为11.2%-29.0%。跑步损伤可能发生在扁平足患者身上;然而，其潜在机制仍然未知。我们通过比较中性足和扁平足的参与者来研究跑步时脚关节之间的协调模式和变化。中性足（n= 15）和扁平足（n= 15）的参与者被要求以他们喜欢的速度跑步。利用改进的矢量编码技术，计算了足部关节间的耦合角，代表关节间的协调，并将其分为四种协调模式。计算耦合角的标准差，以测量站立阶段的协调变化。两组之间的时空参数（速度、步长和节奏）没有差异。在后足矢状面和中足矢状面协调模式中，平足组在早期站立时显示出比中性足组显著更大的近端优势反相比例和更低的近端优势同相比例。扁平足组的后足矢状面和中足矢状面（站立中期）、中足矢状面和前足矢状面（站立早期）以及前足后足矢状面和中足矢状面（站立中期）之间的协调变异性大于中性足组。这也许可以解释为什么扁平足的人很可能会经历跑步受伤。
Flatfoot is a well‐known foot deformity, with a prevalence of 11.2%–29.0% among adults. Running injuries can occur in individuals with flatfoot; however, the underlying mechanism remains unknown. We investigated the coordination pattern and variability among foot joints while running by comparing participants with neutral foot and with flatfoot. Participants with neutral foot (n= 15) and flatfoot (n= 15) were asked to run at their preferred speed. Using the modified vector coding technique, the coupling angle between the foot joints, representing interjoint coordination, was calculated and categorized into four coordination patterns. The standard deviation of the coupling angle was computed to measure the coordination variability during the stance phase. There were no differences in the spatiotemporal parameters (speed, step length, and cadence) between the groups. In the sagittal rearfoot and sagittal midfoot coordination patterns, the flatfoot group showed a significantly greater proportion of anti‐phase with proximal dominancy and a lower proportion of in‐phase with proximal dominancy than the neutral foot group during early stance. Coordination variabilities between the sagittal rearfoot and sagittal midfoot (midstance), between the sagittal midfoot and sagittal forefoot (early stance), and between the frontal rearfoot and sagittal midfoot (midstance) were greater in the flatfoot group than in the neutral foot group. This may explain why those with flatfoot are likely to experience running injuries.