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Does using a chair backrest or reducing seated hip flexion influence trunk muscle activity and discomfort? A systematic review

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dc.contributor.author Curran, Máire
dc.contributor.author O'Sullivan, Leonard
dc.contributor.author O'Sullivan, Peter B.
dc.contributor.author Dankaerts, Wim
dc.contributor.author O'Sullivan, Kieran
dc.date.accessioned 2017-09-28T09:03:59Z
dc.date.available 2017-09-28T09:03:59Z
dc.date.issued 2015
dc.identifier.uri http://hdl.handle.net/10344/6107
dc.description peer-reviewed en_US
dc.description.abstract Objective: This paper systematically reviews the effect of chair backrests and reducing seated hip flexion on low back discomfort (LBD) and trunk muscle activation.Background: Prolonged sitting commonly exacerbates low back pain (LBP). Several modifications to seated posture and chair design have been recommended, including using chairs with backrests and chairs that reduce hip flexion.Method: Electronic databases were searched by two independent assessors. Part 1 of this review includes 26 studies comparing the effect of sitting with at least two different hip angles. In Part 2, seven studies that compared the effect of sitting with and without a backrest were eligible. Study quality was assessed using the PEDro scale.Results: Significant confounding variables and a relatively small number of randomized controlled trials (RCTs) involving people with LBP complicates analysis of the results. There was moderate evidence that chair backrests reduce paraspinal muscle activation, and limited evidence that chair backrests reduce LBD. There was no evidence that chairs involving less hip flexion reduce LBP or LBD, or consistently alter trunk muscle activation. However, participants in several studies subjectively preferred the modified chairs involving less hip flexion.Conclusion: The limited evidence to support the use of chairs involving less seated hip flexion, or the effect of a backrest, is consistent with the limited evidence that other isolated chair design features can reduce LBP.Application: LBP management is likely to require consideration of several factors in addition to sitting position. Larger RCTs involving people with LBP are required. en_US
dc.language.iso eng en_US
dc.relation.ispartofseries Human Factors;57 (7), pp. 1115-48
dc.relation.uri https://doi.org/10.1007/978-94-007-6250-3_4
dc.subject sitting en_US
dc.subject back pain en_US
dc.subject discomfort en_US
dc.subject systematic review en_US
dc.title Does using a chair backrest or reducing seated hip flexion influence trunk muscle activity and discomfort? A systematic review 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 2017-08-21T09:40:12Z
dc.description.version ACCEPTED
dc.identifier.doi 10.1177/0018720815591905
dc.rights.accessrights info:eu-repo/semantics/openAccess en_US
dc.internal.rssid 1617265
dc.internal.copyrightchecked Yes
dc.identifier.journaltitle Human factors
dc.description.status peer-reviewed


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