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Forearm torque strengths and discomfort profiles in pronation and supination

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This experiment investigated maximum forearm pronation and supination torques and forearm discomfort, for intermittent torque exertions in supine and prone forearm angles for the right arm. Twenty-two subjects participated in the study that comprised two parts, the first of which involved measurement of maximum forearm torque in both twisting directions at five forearm angles including neutral. This was followed by endurance tests at 50% maximum voluntary contraction (MVC) in both directions. The second part of the study involved subjects performing 5-min duration of intermittent isometric torque exercises at 20% MVC in both directions at 11 forearm angles. Regression equations were developed that accurately predict torques as a function of forearm angle expressed as a percentage of maximum motion. Analysis of the discomfort data for the intermittent isometric torque exertions indicated that both forearm angle and twisting direction significantly affected forearm discomfort ( p ?
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Keywords: Elbow; Forearm; Musculoskeletal disorders; Pronation; Supination; Torque

Document Type: Research Article

Affiliations: Ergonomics Research Centre, Department of Manufacturing & Operations Engineering, University of Limerick, Limerick, Republic of Ireland

Publication date: May 15, 2005

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