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Major factors influencing rearfoot external eversion moment during barefoot walking.
Gait & Posture ( IF 2.4 ) Pub Date : 2020-05-05 , DOI: 10.1016/j.gaitpost.2020.04.029
Norio Tsujimoto 1 , Hiroyuki Nunome 2 , Yasuo Ikegami 3
Affiliation  

BACKGROUND Excessive rearfoot eversion motion during walking has been considered as a risk factor for lower limb chronic injuries. External moment due to ground reaction force (GRF) is the essential cause by which the rearfoot is passively everted during walking. RESEARCH QUESTION This study aims to identify the key factors influencing the rearfoot external eversion moments due to the GRF during walking. METHODS From 3-D foot coordinates and GRF data of 29 healthy participants during walking, the rearfoot external eversion moments due to the GRF and factors composing the moment (height of the ankle joint center, mediolateral GRF, mediolateral distance of the center of pressure relative to the ankle joint center in the transverse plane, vertical GRF) were computed. RESULTS The mediolateral GRF was a key factor influencing the magnitude of the rearfoot external eversion moment just after foot contact, with which pre-contact medial foot velocity was significantly correlated. During the subsequent support phase, the mediolateral distance of the center of pressure (the application point of the vertical GRF) relative to the ankle joint center was also found to be another determinant of the magnitude of the rearfoot external eversion moment. SIGNIFICANCE We succeeded in demonstrating the specific factors that most likely explain the magnitude of the rearfoot external eversion moment during initial contact and the subsequent support phase during walking. Based on the findings, specific measures to suppress the rearfoot external eversion moment could be proposed.

中文翻译:

影响赤脚行走过程中后足外翻力矩的主要因素。

背景技术在步行期间过度的后足外翻运动已经被认为是下肢慢性受伤的危险因素。地面反作用力(GRF)引起的外部力矩是导致后脚在行走过程中被动外翻的根本原因。研究问题本研究旨在确定影响GRF行走过程中后脚外部外翻力矩的关键因素。方法根据29位健康参与者在行走过程中的3-D脚坐标和GRF数据,由GRF引起的后脚外翻力矩和构成力矩的因素(踝关节中心的高度,前外侧GRF,相对于压力中心的中外侧距离在横断面的踝关节中心处计算垂直GRF)。结果足后接触后外侧GRF是影响后足外翻力矩大小的关键因素,与接触前内侧足速度显着相关。在随后的支撑阶段,还发现压力中心(垂直GRF的施加点)相对于踝关节中心的中外侧距离是后脚外部外翻力矩大小的另一个决定因素。意义我们成功地证明了最有可能解释初始接触过程中后足外翻力矩的大小以及步行过程中随后的支撑阶段的具体因素。基于这些发现,可以提出抑制后足外翻力矩的具体措施。
更新日期:2020-05-05
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