Shank and rearfoot coordination and its variability during running in flatfoot
Shank and rearfoot coordination and its variability during running in flatfoot
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DOI：
10.1016/j.jbiomech.2020.110119
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发表时间：
2021-01-22
影响因子：
2.4
通讯作者：
Kubo, Masayoshi
中科院分区：
文献类型：
--
作者：
Takabayashi, Tomoya;Edama, Mutsuaki;Kubo, Masayoshi
扁平足是髌股关节疼痛综合征（PFPS）的一个危险因素，扁平足中发生的后足过度外翻与PFPS的发生和进展有关;然而，其机制尚不清楚。本研究的目的是调查横向小腿和前后足协调模式和变化时，运行正常脚和扁平足。正常足（n = 13）和扁平足（n = 13）的参与者被要求以他们喜欢的速度跑步。小腿和后足之间的耦合角，代表节间协调，计算使用改进的矢量编码技术，并分为四个协调模式。耦合角的标准偏差被计算为在站立阶段的协调可变性的量度。各组之间的特征和时空参数没有差异，所有参与者都有后脚撞击模式。在站立中期，扁平足组显示出近端（小腿）占优势的反相比例显著高于正常足组（p = 0.04，效应量= 0.88 [大]）。此外，扁平足组的变异性显著大于正常足组（p = 0.03，效应量= 0.91 [大]）。这项研究的结果可能有助于解释为什么扁平足可能导致PFPS。然而，PFPS等跑步损伤的发生机制是多因素的。由于这些结果本身不足以解释扁平足和PFPS等损伤之间的因果关系，因此还需要进行包括髌股关节应力等其他因素的前瞻性研究。(c)2020由Elsevier Ltd.出版
Flatfoot is a risk factor for patellofemoral pain syndrome (PFPS), and excessive rearfoot eversion occurring in flatfoot has been associated with the development and progression of PFPS; however, the mechanism remains unclear. This study aimed to investigate transverse shank and frontal rearfoot coordination patterns and variability when running with normal foot and flatfoot. Participants with normal foot (n = 13) and flatfoot (n = 13) were asked to run at their preferred speed. The coupling angle between the shank and rearfoot, representing intersegmental coordination, was calculated using the modified vector coding technique and categorized into four coordination patterns. Standard deviation of the coupling angle was computed as a measure of coordination variability during the stance phase. No differences in the characteristics and spatiotemporal parameters between groups were found, and all participants had rearfoot strike pattern. During midstance, the flatfoot group showed a significantly greater proportion of anti phase with proximal (shank) dominancy than the normal foot group (p = 0.04, effect size = 0.88 [large]). Furthermore, flatfoot group showed a significantly greater in variability than the normal foot group (p = 0.03, effect size = 0.91 [large]). This study's results may help explain why flatfoot is likely to result in PFPS. However, the occurrence mechanism of running injuries like PFPS is multi-factorial. Since these results alone are not sufficient to explain the cause-effect relationship between flatfoot and injuries like PFPS, a prospective study including other factors such as patellofemoral joint stress would also be needed. (c) 2020 Published by Elsevier Ltd.