Skip to main content
Kent Academic Repository

Changes in segmental inertial properties with age

Winter, Samantha L., Muri, Jennifer, Challis, John H. (2008) Changes in segmental inertial properties with age. Journal of Biomechanics, 41 (8). pp. 1809-1812. ISSN 0021-9290. (doi:10.1016/j.jbiomech.2008.03.002) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided) (KAR id:40369)

The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided.
Official URL:


The purpose of this study was to examine how the limb segment inertial parameters vary across the decades from the 1920s to the 1970s. Sixty-six males participated in this study, ranging in age from 20 to 79 years. Pre-screening ensured that all subjects were healthy. The inertial properties of the segments were determined by modeling each segment as series of geometric solids. A multivariate analysis of variance (ANOVA) revealed statistically significant differences between decade age groups for the upper arm, forearm, shank, and thigh (p<0.01). Subsequent ANOVAs revealed statistically significant differences for all the inertial properties for the upper arm, the center of mass location for the forearm, and segment mass for the thigh. Linear regression lines were fit to the data so that each inertial parameter for each segment could be predicted by subject's age, with the slope of this regression line indicating the trend in the data. These trends were statistically significant for all forearm inertial parameters, thigh mass and longitudinal moment of inertia, and forearm center of mass location. The changes for the thigh, upper arm, and forearm were consistent with the changes, which would accompany a change in muscle mass with aging. Resultant joint moments were computed for a set of gait data using inertial properties reflective of the subjects from the age extremes in the study. The resulting differences in the knee and hip moments, young versus old, were all less than 4.5%.

Item Type: Article
DOI/Identification number: 10.1016/j.jbiomech.2008.03.002
Additional information: number of additional authors: 2;
Uncontrolled keywords: Elderly, Mass, Center of mass, Moment of inertia
Subjects: H Social Sciences
Divisions: Divisions > Division of Natural Sciences > Sport and Exercise Sciences
Depositing User: Samantha Winter
Date Deposited: 07 Mar 2014 00:05 UTC
Last Modified: 16 Nov 2021 10:15 UTC
Resource URI: (The current URI for this page, for reference purposes)

University of Kent Author Information

  • Depositors only (login required):

Total unique views for this document in KAR since July 2020. For more details click on the image.