Task, but not workspace configuration, influences postural sway during computer work

Adjustable-height desks are promoted to reduce the detrimental effects of prolonged sitting. Musculoskeletal benefits may arise from increased postural variability, often measured as postural sway. We assessed postural sway using inertial measurement units while participants used computer workstations in seated and standing postures and during both typing and clicking tasks. Median acceleration of the head and trunk was significantly lower in typing compared to clicking tasks, but there were no significant differences between seated and standing positions. The results suggest that different mental demands of tasks may play a larger role in postural sway than workstation configuration.