Zhou Huiyu, Cen Xuanzhen, Song Yang, Ugbolue Ukadike C, Gu Yaodong
Faculty of Sports Science, Ningbo University; School of Health and Life Sciences, University of the West of Scotland.
Faculty of Sports Science, Ningbo University.
J Vis Exp. 2020 Aug 25(162). doi: 10.3791/61558.
Gait termination caused by unexpected stimulus is a common occurrence in everyday life. This study presents a protocol to investigate the lower-limb biomechanical changes that occur during unplanned gait termination (UGT) under different walking speeds. Fifteen male participants were asked to perform UGT on a walkway at normal walking speed (NWS) and fast walking speed (FWS), respectively. A motion analysis system and plantar pressure platform were applied to collect lower-limb kinematic and plantar pressure data. Paired-sampled T-test was used to examine the differences in lower-limb kinematics and plantar pressure data between two walking speeds. The results showed larger range of motion in the hip, knee, and ankle joints in the sagittal plane as well as plantar pressure in forefoot and heel regions during UGT at FWS when compared with NWS. With the increase in walking speed, subjects exhibited different lower-limb biomechanical characteristics that show FWS associated with greater potential injury risks.
由意外刺激导致的步态终止在日常生活中很常见。本研究提出了一个方案，用于调查在不同步行速度下非计划步态终止（UGT）过程中发生的下肢生物力学变化。15名男性参与者被要求分别在人行道上以正常步行速度（NWS）和快速步行速度（FWS）进行UGT。应用运动分析系统和足底压力平台收集下肢运动学和足底压力数据。配对样本T检验用于检验两种步行速度之间下肢运动学和足底压力数据的差异。结果表明，与NWS相比，在FWS下进行UGT时，矢状面的髋关节、膝关节和踝关节的运动范围更大，前脚掌和脚跟区域的足底压力也更大。随着步行速度的增加，受试者表现出不同的下肢生物力学特征，表明FWS与更大的潜在受伤风险相关。
