The influence of operator and wheelchair factors on wheelchair propulsion effort

Disability and Rehabilitation. Assistive Technology
Jui-Te Lin, Stephen Sprigle

Abstract

Purpose: The goal of this study was to evaluate the relative influence of operator and wheelchair factors on propulsion effort during over-ground wheelchair manoeuvres.Method: This observational study included 23 full-time manual wheelchair users and 13 able-bodied subjects. The operator factors included shoulder position, aerobic capacity and propulsion strength. The wheelchair factors included system mass, weight distribution, and frictional loss in straight and turning trajectories. The performance of over-ground manoeuvres was defined as the propulsion effort measured by VO2 as operators propelled along a modified figure-8 course on tile and carpet surfaces.Results: According to our regression model, shoulder position was the only significant contributor within operator factors, whereas weight distribution was the only significant contributor within wheelchair factors in influencing propulsion efforts. When combining operator and mechanical factors in the regression model, weight distribution became the only significant contributor to influence propulsion effort.Conclusion: Weight distribution and shoulder position had a significant influence on propulsion effort. These variables are related to the operator's relationship t...Continue Reading

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