Department of Kinesiology, University of Montreal, Montreal, QC, Canada.
Med Eng Phys. 2009 Nov;31(9):1187-94. doi: 10.1016/j.medengphy.2009.07.015. Epub 2009 Aug 15.
Body segment masses and center of mass (COM) locations are required to calculate intersegmental forces and net joint moments using inverse or forward dynamics equations. These inertial properties are estimated from methods involving cadavers or living individuals. The present clinical methods are limited to similar populations from which the anthropometric measures were obtained. This study presented a simple force plate method that can be used to determine subject-specific segment masses and COM locations and compared it to other well-known methods. The proposed method was tested in individuals with different body mass index (i.e., lean, normal, and obese) to verify its sensitivity. All the segmental mass and COM values obtained from the force plate method were within the range of those of the other methods for the entire sample. Significant differences were identified between the morphological groups in relative segmental masses at the upper arm and leg and foot, and COM locations at the leg and foot and head and trunk as obtained from the force plate method (p<0.05). The proposed method involves direct procedures to determine subject-specific segmental masses and COM locations. It is sensitive to detect differences between various morphological populations.
为了使用逆动力学或正动力学方程计算节段间力和净关节力矩，需要身体节段质量和质心 (COM) 位置。这些惯性特性是通过涉及尸体或活体的方法来估计的。目前的临床方法仅限于获得人体测量数据的类似人群。本研究提出了一种简单的力板方法，可用于确定特定于个体的节段质量和 COM 位置，并将其与其他知名方法进行比较。该方法在具有不同身体质量指数（即瘦、正常和肥胖）的个体中进行了测试，以验证其敏感性。从力板方法获得的所有节段质量和 COM 值均在整个样本中其他方法的范围内。从力板方法获得的上肢和下肢以及足部的相对节段质量和 COM 位置以及下肢和足部以及头部和躯干的 COM 位置在形态学组之间存在显著差异（p<0.05）。所提出的方法涉及直接程序来确定特定于个体的节段质量和 COM 位置。它对检测不同形态群体之间的差异很敏感。
