Pavol Michael J, Owings Tammy M, Grabiner Mark D
Department of Physical Therapy (MC 898), University of Illinois at Chicago, 1919 West Taylor Street, 4th Floor, Chicago, IL 60612, USA.
J Biomech. 2002 May;35(5):707-12. doi: 10.1016/s0021-9290(01)00250-0.
The practical determination of accurate body segment inertial parameters for the general older adult population remains a problem, especially in estimating these parameters for women and accounting for variations in body type. A method is presented for determining the mass and center of mass location of the body segments of individuals within the general population of older adults. Effects of sex and body type on older adult mass distribution are accounted for using 32 easily obtainable body measurements. The method is based on existing results from different data sources and employs a combination of validated estimation approaches, including: body mass and segment length proportions, linear and nonlinear regression equations, and a mathematical model of the trunk. The method was applied to a validation sample of healthy, community-dwelling older adults (29 men, 50 women). Predicted body mass was 96.7+/-4.8% and 95.7+/-3.7% of measured body mass in the men and women, respectively. The estimates of body segment mass and trunk center of mass location for the sample population approximate those reported in the literature, supporting the validity of the described method. By producing practical, subject-specific estimates of body segment inertial parameters, the method should allow more accurate biomechanical analyses of the older adult population.
对于一般老年人群体而言，准确确定身体各节段惯性参数仍然是个问题，尤其是在估算女性的这些参数以及考虑体型差异方面。本文提出了一种确定一般老年人群体中个体身体各节段质量和质心位置的方法。利用32项易于获取的身体测量数据，考虑了性别和体型对老年人体质量分布的影响。该方法基于不同数据源的现有结果，并采用了多种经过验证的估算方法，包括：体重和节段长度比例、线性和非线性回归方程以及躯干数学模型。该方法应用于一个健康的、居住在社区的老年人群体的验证样本（29名男性，50名女性）。男性和女性预测体重分别为实测体重的96.7±4.8%和95.7±3.7%。样本群体身体节段质量和躯干质心位置的估计值与文献报道的相近，支持了所描述方法的有效性。通过生成针对个体的身体节段惯性参数的实用估计值，该方法应能对老年人群体进行更准确的生物力学分析。
