PDF(Pubmed)
Abstract：
Squatting is a common motion in activities of daily living and is frequently used in training programs. Squatting requires a shift of the body in both vertical and anterior-posterior directions. Postural control during squatting is considered a mixed strategy; however, details and roles of the trunk and lower limb joints are unclear. The purpose of this study was to investigate the relationship among the kinematics of the lower limb, the trunk and the center of mass (COM) descent during squatting. Twenty-six healthy young adults performed repeated parallel squats. Lower limb joint and trunk angles and the COM were analyzed using a 3D motion analysis system. We evaluated the relationship between the kinematics and the squat depth by performing correlation analysis and multiple linear regression analysis. The ankle was the first to reach its maximum angle, and the remaining joints reached their maximum angles at the maximum squat depth. The knee joint motion and the squat depth were significantly correlated and there was a correlation between the hip and the ankle joint motion and the anteroposterior displacement of the COM during squatting. Multivariate linear regression analysis indicated that squat depth was predicted by both the knee and ankle motion and that anteroposterior displacement of the COM was predicted by the hip, ankle, and knee joint motion. The knees contributed to the vertical COM motion during squatting, while the hips contributed to the COM motion in the anteroposterior direction. On the other hand, the ankles contributed to COM motions in both the vertical and anteroposterior directions during squatting.
摘要：
蹲是日常生活活动中的常见动作，经常用于训练计划。下蹲需要身体在垂直和前后方向上的移动。下蹲期间的姿势控制被认为是一种混合策略；但是，躯干和下肢关节的细节和作用尚不清楚。这项研究的目的是研究下肢运动学之间的关系，蹲下时躯干和质心(COM)下降。26名健康的年轻人反复进行平行深蹲。使用3D运动分析系统分析了下肢关节和躯干角度以及COM。我们通过进行相关分析和多元线性回归分析来评估运动学与深蹲深度之间的关系。脚踝是第一个达到最大角度的，其余关节在最大深蹲深度达到最大角度。膝关节运动与下蹲深度显着相关，并且在下蹲期间髋关节和踝关节运动与COM的前后位移之间存在相关性。多元线性回归分析表明，深蹲深度可通过膝关节和踝关节的运动来预测，而COM的前后位移可通过髋关节来预测。脚踝,和膝关节运动。膝盖在下蹲时促进了垂直COM运动，而臀部在前后方向上促进了COM运动。另一方面,下蹲期间，脚踝在垂直和前后方向上都促进了COM运动。
