Analysis of Joint Kinematics during Quiet Standing following Localized Lumbar Extensor Fatigue

In recent years, many studies have reported increases in postural sway with localized muscle fatigue. Results of these studies have shown increases in sway based on characteristics of the center of pressure (COP) and center of mass (COM) trajectories. While these measures are certainly important in assessing postural stability and control (Maki et al., 1991), they are limited in discerning postural strategies and movement patterns (Kuo et al., 1998). Therefore, in order to advance our understanding of these reported changes in postural sway following fatigue, it is necessary to employ measures which are more sensitive to subtle changes in body movements.