Khurelbaatar Tsolmonbaatar, Kim Kyungsoo, Lee SuKyoung, Kim Yoon Hyuk
Department of Mechanical Engineering, Kyung Hee University, Yongin, Republic of Korea.
Department of Applied Mathematics, Kyung Hee University, Yongin, Republic of Korea.
Gait Posture. 2015 Jun;42(1):65-9. doi: 10.1016/j.gaitpost.2015.04.007. Epub 2015 Apr 24.
To analyze human motion such as daily activities or sports outside of the laboratory, wearable motion analysis systems have been recently developed. In this study, the joint forces and moments in whole-body joints during gait were evaluated using a wearable motion analysis system consisting of an inertial motion measurement system and an in-shoe pressure sensor system. The magnitudes of the joint forces and the moments in nine joints (cervical, thoracic, lumbar, right shoulder, right elbow, right wrist, right hip, right knee, and right ankle) during gait were calculated using the wearable system and the conventional system, respectively, based on a standard inverse dynamics analysis. The averaged magnitudes of the joint forces and moments of five subjects were compared between the wearable and conventional systems in terms of the Pearson's correlation coefficient and the normalized root mean squared error to the maximum value from the conventional system. The results indicated that both the joint forces and joint moments in human whole body joints using wearable inertial motion sensors and in-shoe pressure sensors were feasible for normal motions with a low speed such as walking, although the lower extremity joints showed the strongest correlation and overall the joint moments were associated with relatively smaller correlation coefficients and larger normalized root mean squared errors in comparison with the joint forces. The portability and mobility of this wearable system can provide wide applicability in both clinical and sports motion analyses.
为了分析诸如日常活动或实验室外运动等人体运动，近年来已开发出可穿戴运动分析系统。在本研究中，使用由惯性运动测量系统和鞋内压力传感器系统组成的可穿戴运动分析系统，评估了步态期间全身关节的关节力和力矩。基于标准逆动力学分析，分别使用可穿戴系统和传统系统计算了步态期间九个关节（颈椎、胸椎、腰椎、右肩、右肘、右手腕、右髋、右膝和右踝）的关节力大小和力矩。根据皮尔逊相关系数和相对于传统系统最大值的归一化均方根误差，比较了可穿戴系统和传统系统中五名受试者的关节力和力矩的平均大小。结果表明，使用可穿戴惯性运动传感器和鞋内压力传感器测量人体全身关节的关节力和关节力矩，对于诸如行走等低速正常运动是可行的，尽管与关节力相比，下肢关节显示出最强的相关性，并且总体上关节力矩的相关系数相对较小，归一化均方根误差较大。这种可穿戴系统的便携性和移动性可在临床和运动动作分析中提供广泛的适用性。
