Shoulder and elbow motion during two speeds of wheelchair propulsion: a description using a local coordinate system.

摘要: Individuals who propel wheelchairs have a high prevalence of upper extremity injuries. To better understand the mechanism behind these injuries this study investigates motion shoulder and elbow during wheelchair propulsion. The objectives are: (1) describe occurring at in anatomical terms propulsion; (2) to obtain variables that characterize are statistically stable; (3) determine how change with speed. participants were convenience sample Paralympic athletes use manual for mobility unimpaired arm function. Each subject propelled an ultralight on dynamometer 1.3 2.2 meters per second (m/s). Biomechanical data was obtained using force moment sensing pushrim analysis system. main outcome measures investigated were: maximum minimum angles while contact pushrim, range entire stroke peak accelerations. All found be stable both speeds (Cronbach's alpha > 0.8). following differ speed (data format: measure m/s +/- SD; SD): abduction angle propulsion (24.5 degrees 6.7, 21.6 7.2), flexion/extension (54.0 9.9, 58.1 10.4) sagittal (74.8 9.4, 82.6 8.5), acceleration (4044 degrees/s2 946, 7146 1705), abduction/adduction (2678 767, 4928 1311), (9355 4120, 12889 5572). This described local coordinate Stable parameters propulsive differed found. In future same may provide insight into cause prevention wheelchair.