Related Experiment Video
Updated: Aug 2, 2026
Standardized Histomorphometric Evaluation of Osteoarthritis in a Surgical Mouse Model
Published on: May 6, 2020
Objective measurement of stiffness in knee osteoarthritis
1Sinclair School of Nursing, University of Missouri-Columbia, Missouri, USA.
Purpose:
The purpose of this study was to evaluate an objective measure of knee joint stiffness in older adults with and without knee osteoarthritis.
Design:
Methodological study of the modified pendulum test.
Sample:
A convenience sample of community-dwelling older adults (n = 41).
Methods:
Knee angle oscillation data were collected with a VICON motion analysis system and were used to calculate stiffness and damping coefficients and measures of joint stiffness.
Findings:
Although some testing problems were encountered early in the study, useable data were obtained from 29 participants. Within-participant variability for calculated stiffness and damping coefficients was low (0.55% and 8.92%, respectively), whereas the between-participant variability was high for both the stiffness (99.45%) and damping (91.08%) coefficients.
Discussion:
The modified pendulum test is a reliable method for evaluation of knee joint stiffness. This method can be used in collection of outcome data for future intervention studies addressing joint stiffness.
