Iskandar Muhammad Nur Shahril, Loh Ray Ban Chuan, Ho Mee Yee Mavis, Pan Jing Wen, Kong Pui Wah
Physical Education and Sports Science Academic Group, National Institute of Education, Nanyang Technological University, Singapore, Singapore.
Sports Medicine and Surgery Clinic, Tan Tock Seng Hospital, Singapore, Singapore.
Front Bioeng Biotechnol. 2023 Jul 14;11:1210049. doi: 10.3389/fbioe.2023.1210049. eCollection 2023.
Foot inversion angle at initial foot strike is associated with various running-related injuries. Traditionally, video analysis of foot inversion angle has been accomplished by positioning a camera to record from the back view, but complications arise when a crossover gait obscures the area of measurement. This study aims to investigate the viability of measuring foot inversion angles at initial foot strike of running from the front view as an alternative to using the back view in 2D video analysis. Forty-four healthy runners (20 females, 24 males) ran at their self-selected speeds on a treadmill with their gait recorded from front and back camera views. Foot inversion angles at initial foot strike were analyzed using Kinovea. A 2 × 2 (Camera × Foot) ANOVA with repeated measures was performed on the foot inversion angle data. Subsequently, correlation and linear regression were performed to determine the relationship between the back and front-view measurements. Thirteen runners (29.5%) displayed crossover gait within 18 gait cycles. ANOVA revealed a significant main effect on Camera ( < .001) only, where foot inversion angle was greater from the front camera view. Correlation analysis showed a significant positive correlation between the front and back camera views ( = 0.388, < .001). Regression analyses yielded an equation, = 0.42 + 0.53 , where and were the foot inversion angle measured from the back and front camera views, respectively. With a linear regression conversion equation, front-view foot inversion angles at initial foot strike can be used to determine rearfoot inversion angles when crossover gait obstructs the back camera view.
初始触地时的足内翻角度与多种跑步相关损伤有关。传统上，足内翻角度的视频分析是通过放置一台摄像机从后视图进行记录来完成的，但当交叉步态遮挡测量区域时就会出现问题。本研究旨在探讨在二维视频分析中，从正视图测量跑步初始触地时的足内翻角度作为使用后视图的替代方法的可行性。44名健康跑步者（20名女性，24名男性）在跑步机上以自己选择的速度跑步，同时从前后摄像头视角记录他们的步态。使用Kinovea软件分析初始触地时的足内翻角度。对足内翻角度数据进行了重复测量的2×2（摄像头×脚）方差分析。随后，进行相关性和线性回归分析以确定后视图和前视图测量值之间的关系。13名跑步者（29.5%）在18个步态周期内表现出交叉步态。方差分析仅显示对摄像头有显著的主效应（<.001），其中从前摄像头视角测得的足内翻角度更大。相关性分析显示前摄像头视图和后摄像头视图之间存在显著的正相关（=0.388，<.001）。回归分析得出一个方程，=0.42 + 0.53 ，其中和分别是从后摄像头视图和前摄像头视图测得的足内翻角度。利用线性回归转换方程，当交叉步态遮挡后摄像头视图时，初始触地时的前视图足内翻角度可用于确定后足内翻角度。
