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Lumbar posture and trunk muscle activation during static and dynamic seated tasks on a novel dynamic ergonomic chair

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dc.contributor.author O'Sullivan, Kieran
dc.contributor.author McCarthy, Raymond
dc.contributor.author White, Alison
dc.contributor.author O'Sullivan, Leonard
dc.contributor.author Dankaerts, Wim
dc.date.accessioned 2017-04-11T09:02:35Z
dc.date.available 2017-04-11T09:02:35Z
dc.date.issued 2012
dc.identifier.uri http://hdl.handle.net/10344/5685
dc.description peer-reviewed en_US
dc.description.abstract Low back pain (LBP) is a common musculoskeletal disorder and prolonged sitting often aggravates LBP. A novel dynamic ergonomic chair (‘Back App’), which facilitates less hip flexion while sitting on an unstable base has been developed. This study compared lumbar posture and trunk muscle activation on this novel chair with a standard backless office chair. Twelve painfree participants completed a typing task on both chairs. Lumbar posture and trunk muscle activation were collected simultaneously and were analysed using paired t-tests. Sitting on the novel dynamic chair significantly (p < 0.05) reduced both lumbar flexion and the activation of one back muscle (Iliocostalis Lumborum pars Thoracis). The discomfort experienced was mild and was similar (p > 0.05) between chairs. Maintaining lordosis with less muscle activation during prolonged sitting could reduce the fatigue associated with upright sitting postures. Studies with longer sitting durations, and in people with LBP, are required. Practitioner Summary: Sitting on a novel dynamic chair resulted in less lumbar flexion and less back muscle activation than sitting on a standard backless office chair during a typing task among pain-free participants. Facilitating lordotic sitting with less muscle activation may reduce the fatigue and discomfort often associated with lordotic sitting postures. en_US
dc.language.iso eng en_US
dc.publisher Taylor and Francis en_US
dc.relation.ispartofseries Ergonomics;55, (12), pp.1586-95
dc.relation.uri http://dx.doi.org/10.1080/00140139.2012.721521
dc.rights This is an Author's Manuscript of an article whose final and definitive form, the Version of Record, has been published in Ergonomics 2012, 55, (12), pp. 1586-95 copyright Taylor & Francis, available online at: http://dx.doi.org/10.1080/00140139.2012.721521 en_US
dc.subject posture en_US
dc.subject back pain en_US
dc.subject ergonomics en_US
dc.subject lordosis en_US
dc.subject sitting en_US
dc.title Lumbar posture and trunk muscle activation during static and dynamic seated tasks on a novel dynamic ergonomic chair en_US
dc.type info:eu-repo/semantics/article en_US
dc.type.supercollection all_ul_research en_US
dc.type.supercollection ul_published_reviewed en_US
dc.date.updated 2017-04-11T08:51:30Z
dc.description.version ACCEPTED
dc.identifier.doi 10.1080/00140139.2012.721521
dc.contributor.sponsor HRB en_US
dc.rights.accessrights info:eu-repo/semantics/openAccess en_US
dc.internal.rssid 1399432
dc.internal.copyrightchecked Yes
dc.identifier.journaltitle Ergonomics
dc.description.status peer-reviewed


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