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Upper limb discomfort profile due to intermittent isometric pronation torque at different postural combinations of the shoulder-arm system

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dc.contributor.author Mukhopadhyay, Prabir
dc.contributor.author O'Sullivan, Leonard
dc.contributor.author Gallwey, Timothy J.
dc.date.accessioned 2017-04-12T11:53:21Z
dc.date.available 2017-04-12T11:53:21Z
dc.date.issued 2009
dc.identifier.issn 0014-0139
dc.identifier.uri http://hdl.handle.net/10344/5700
dc.description peer-reviewed en_US
dc.description.abstract Twenty-seven right-handed male university students participated in this study, which comprised a full factorial model consisting of three forearm rotation angles (60% prone and supine and neutral range of motion), three elbow angles ( 45°, 90° and 135°), three upper arm angles ( 45° flexion/extension and neutral), one exertion frequency ( 15 per min) and one level of pronation torque (20% maximum voluntary contraction (MVC) relative to MVC at each articulation). Discomfort rating after the end of each 5 min treatment was recorded on a visual analogue scale. Results of a repeated measures analysis of covariance on discomfort score, with torque endurance time as covariate, indicated that none of the factors was significant including torque endurance time (p = 0.153). An initial data collection phase preceded the main experiment in order to ensure that participants exerted exactly 20% MVC of the particular articulation. In this phase MVC pronation torque was measured at each articulation. The data revealed a significant forearm rotation angle effect (p = 0.001) and participant effect (p = 0.001). Of the two-way interactions, elbow*participant (p = 0.004), forearm*participant (p = 0.001) and upper arm* participant (p = 0.005) were the significant factors. Electromyographic activity of the pronator teres and biceps brachii muscles revealed no significant change in muscle activity in most of the articulations. Industrial jobs involving deviated upper arm postures are typical in industry but have a strong association with injury. Data from this study will enable better understanding of the effects of deviated upper arm postures on musculoskeletal disorders and can also be used to identify and control high-risk tasks in industry. en_US
dc.language.iso eng en_US
dc.publisher Taylor and Francis en_US
dc.relation.ispartofseries Ergonomics;52 (5), pp. 584-600
dc.relation.uri http://dx.doi.org/10.1080/00140130802396438
dc.rights This is an Author's Manuscript of an article whose final and definitive form, the Version of Record, has been published in the Ergonomics 2009 copyright Taylor & Francis, available online at: http://dx.doi.org/10.1080/00140130802396438 en_US
dc.subject upper arm en_US
dc.subject flexion en_US
dc.subject extension en_US
dc.subject pronation torque en_US
dc.subject pronation en_US
dc.subject supination en_US
dc.title Upper limb discomfort profile due to intermittent isometric pronation torque at different postural combinations of the shoulder-arm system en_US
dc.type info:eu-repo/semantics/article
dc.type.supercollection all_ul_research en_US
dc.type.supercollection ul_published_reviewed en_US
dc.date.updated 2017-04-12T11:44:48Z
dc.description.version ACCEPTED
dc.identifier.doi 10.1080/00140130802396438
dc.rights.accessrights info:eu-repo/semantics/openAccess en_US
dc.internal.rssid 1135206
dc.internal.copyrightchecked Yes
dc.contributor.funder European Commission
dc.identifier.journaltitle ERGONOMICS
dc.description.status peer-reviewed


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