Effects of Combined Trunk Rotation and Lateral Bending on Postural Stability on Restricted Platforms

Abstract

This study examined the effects of trunk rotation and lateral bending on fall risk estimation during tasks performed on stepladders. Postural stability was assessed by measuring foot reaction force sway during a 60-second standing balance task. The results indicated a significant increase in postural sway when all of the following conditions were present: a greater asymmetry angle, trunk flexion due to changes in gaze direction, and a reduced foothold width.