Load on the upper extremity in manual wheelchair propulsion

作者: H.E.J. Veeger , L.H.V. van der Woude , R.H. Rozendal

DOI: 10.1016/1050-6411(91)90014-V

关键词: PropulsionElbowMathematicsManual wheelchairPhysical therapyWheelchairPhysical medicine and rehabilitationShoulder flexionElectromyographyPectoralis MuscleMechanical advantageBiophysicsClinical neurologyNeuroscience (miscellaneous)

摘要: Abstract To study joint contributions in manual wheelchair propulsion, we developed a three-dimensional model of the upper extremity. The was applied to data collected an experiment on ergometer which mechanical advantage (MA) manipulated. Five male able-bodied subjects performed two exercise tests (external power output P ext = 0.25–0.50 W · kg −1 ) against increasing speeds (1.11–1.39–1.67 m.s ), simulated MA 0.58–0.87. Results indicated decrease efficiency (ME) with that could not be related forces or torques. Increase increases On average, highest torques were noted shoulder flexion and adduction (35.6 24.6 N m at MA=0.58 0.50 ). Peak elbow extension −10.6 8.5 m. Based combination electromyographic (EMG) records extremity muscles, anterior deltoid pectoralis muscles are considered prime movers propulsion. Coordinative aspects propulsion concerning function (biarticular) directing propulsive redistribution closed chain discussed. We found no conclusive evidence for role extensors direction forces.

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