BODY SEGMENT INERTIA PROPERTIES OF JAPANESE ELDERLY

• DOI: 10.3951/biomechanisms.13.125
• Publication Date: 2016-12-05T22:11:29Z
• Authors: Hidetaka OKADA; Michiyoshi AE; Norihisa FUJII; Yasunori MORIOKA
• Keywords: Torso; Body segment; Upper body; Body height

In the analysis of human movement, it is significant that appropriate parameters inertia property body segments should be used because they will affect various computed kinetic variables. When analyzing movement elderly people, also desirable to use suitable for elderly. Although there are sets children (Yokoi et al., 1986) and young adults (Ae 1992) Japanese, no report exists on those Japanese The purposes this study were determine mass, location center mass (CM) principal moments about three axes males females by using an elliptical zone model (Jensen, 1978; Ae 1992), develop a set regression equations estimate simple anthropometric measurements as predictors. Subjects 90 aged 62 86 yr. (mean 75.1 yr.) 89 61 83 73.0 yr.). Each subject, wearing swimming suit cap, was photographed in standing position measurement frame with thin mirror mounted at angle 45° subject. Body head, whole torso, upper arms, forearms, hands, thighs, shanks, feet, torso lower torso. They modeled stacked system zones 2cm thickness. Segment density assumed uniform selected from 26 segment densities after Dempster (1955) Chandler al. (1975). mean errors estimation total -0.07±0.54% (maximal error: -2.03%) -0.01±0.45% -1.27%) females. Equations determined stepwise multiple age, height, weight length results obtained could summarized follows: 1) There differences many between percent ratios forearm, hand, foot significantly larger than females, but thigh, shank males. 2) Canadian (Jensen 1993; 1994). 3) correlation coefficients estimated all (0.328-0.979; p<0.01). valid properties