Primary mechanical factors contributing to foot eversion moment during the stance phase of running
Primary mechanical factors contributing to foot eversion moment during the stance phase of running
复制标题
跑步站立阶段影响足部外翻力矩的主要力学因素
DOI：
10.1080/02640414.2016.1201209
复制
发表时间：
2017
影响因子：
3.4
通讯作者：
Yasuo Ikegami
中科院分区：
文献类型：
--
作者：
Norio Tsujimoto;Hiroyuki Nunome;Yasuo Ikegami
在跑步过程中，由于地面反作用力（GRF）引起的后足外部外翻力矩被认为是导致过度使用跑步损伤的原因。本研究旨在确定导致这些后足外外翻力矩的主要因素。14名健康男性以3.30 ± 0.17 m · s-1的速度赤脚跑过30 m跑道中间的测力板。总后足外部外翻/内翻力矩（Mtot）被分解为由内外侧GRF（Fxy）引起的分量Mxy和由垂直GRF（Fz）引起的分量Mz。踝关节中心高度和从压力中心到踝关节中心的内外侧距离（a_cop）被计算为这些力矩的力臂。脚跟接触后Mxy占主导地位的Mtot，其幅度强烈依赖于Fxy，这很可能是由脚跟接触前的中外侧脚速度引起的。然后，Mz在整个站立阶段的前半部分成为Mtot的主要生成器，在此期间a_cop是影响幅度的关键因素。在脚跟接触前的中外侧脚速度和从压力中心到踝关节中心的中外侧距离在整个站立阶段的前半部分被确定为诱导后足外部外翻力矩的主要因素。
Rearfoot external eversion moments due to ground reaction forces (GRF) during running have been suggested to contribute to overuse running injuries. This study aimed to identify primary factors inducing these rearfoot external eversion moments. Fourteen healthy men ran barefoot across a force plate embedded in the middle of 30-m runway with 3.30 ± 0.17 m · s–1. Total rearfoot external eversion/inversion moments (Mtot) were broken down into the component Mxy due to medio-lateral GRF (Fxy) and the component Mz due to vertical GRF (Fz). Ankle joint centre height and medio-lateral distance from the centre of pressure to the ankle joint centre (a_cop) were calculated as the moment arm of these moments. Mxy dominated Mtot just after heel contact, with the magnitude strongly dependent on Fxy, which was most likely caused by the medio-lateral foot velocity before heel contact. Mz then became the main generator of Mtot throughout the first half of the stance phase, during which a_cop was the critical factor influencing the magnitude. Medio-lateral foot velocity before heel contact and medio-lateral distance from the centre of pressure to the ankle joint centre throughout the first half of the stance phase were identified as primary factors inducing the rearfoot external eversion moment.