Midtarsal locking, the windlass mechanism, and running strike pattern: A kinematic and kinetic assessment
Midtarsal locking, the windlass mechanism, and running strike pattern: A kinematic and kinetic assessment
复制标题
DOI：
10.1016/j.jbiomech.2018.04.010
复制
发表时间：
2018-05-17
影响因子：
2.4
通讯作者：
Barrios, Joaquin A.
中科院分区：
文献类型：
--
作者：
Bruening, Dustin A.;Pohl, Michael B.;Barrios, Joaquin A.
在运行罢工模式的变化影响踝关节和膝关节力学，但很少有人知道罢工模式的影响，踝关节远端。本研究的目的是探讨前足着地（FFS）和后足着地（RFS）的运行模式对脚的运动学和动力学的影响，从跗中锁定理论和绞盘机制的角度。根据跗中锁定理论，我们假设在使用FFS时，踝关节在早期站立时会更内翻，导致跗中关节偏移减少和动态刚度增加。与更多参与绞盘机制相关，我们假设FFS会引起跖趾关节偏移增加和后期站立时的负功。18名健康的女性跑步者以FFS和RFS模式跑过地面。仪器运动捕捉和验证的多段脚模型被用来分析中跗关节和跖趾关节的运动学和动力学。在FFS的早期站立中，踝关节内翻更多，同时减少了跗中外翻（p < 0.001）和外展偏移（p = 0.003），但增加了背屈偏移（p = 0.005）。动态跗中刚度没有差异（p = 0.761）。在FFS后期站立时，跖趾伸展增加（p = 0.009），同时负功增加（p < 0.001）。此外，同时增加了跗中正功（p < 0.001），这表明FFS中的能量传递增强。在跑步过程中，没有观察到任何一种撞击模式存在跗中锁定的明确证据。然而，在FFS过程中，锚机机构似乎在更大程度上参与。(C)2018爱思唯尔有限公司版权所有。
Changes in running strike pattern affect ankle and knee mechanics, but little is known about the influence of strike pattern on the joints distal to the ankle. The purpose of this study was to explore the effects of forefoot strike (FFS) and rearfoot strike (RFS) running patterns on foot kinematics and kinetics, from the perspectives of the midtarsal locking theory and the windlass mechanism. Per the midtarsal locking theory, we hypothesized that the ankle would be more inverted in early stance when using a FFS, resulting in decreased midtarsal joint excursions and increased dynamic stiffness. Associated with a more engaged windlass mechanism, we hypothesized that a FFS would elicit increased metatarsophalangeal joint excursions and negative work in late stance. Eighteen healthy female runners ran overground with both FFS and RFS patterns. Instrumented motion capture and a validated multi-segment foot model were used to analyze midtarsal and metatarsophalangeal joint kinematics and kinetics. During early stance in FFS the ankle was more inverted, with concurrently decreased midtarsal eversion (p < 0.001) and abduction excursions (p = 0.003) but increased dorsiflexion excursion (p = 0.005). Dynamic midtarsal stiffness did not differ (p = 0.761). During late stance in FFS, metatarsophalangeal extension was increased (p = 0.009), with concurrently increased negative work (p < 0.001). In addition, there was simultaneously increased midtarsal positive work (p < 0.001), suggesting enhanced power transfer in FFS. Clear evidence for the presence of midtarsal locking was not observed in either strike pattern during running. However, the windlass mechanism appeared to be engaged to a greater extent during FFS. (C) 2018 Elsevier Ltd. All rights reserved.