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Article: The feasibility of repositioning ability as a tool for ergonomic evaluation: Effects of chair back inclination and fatigue on head repositioning

TitleThe feasibility of repositioning ability as a tool for ergonomic evaluation: Effects of chair back inclination and fatigue on head repositioning
Authors
KeywordsBackrest inclination
Biomechanics
Fatigue
Head repositioning
Issue Date2006
PublisherTaylor & Francis Ltd. The Journal's web site is located at http://www.tandf.co.uk/journals/titles/00140139.asp
Citation
Ergonomics, 2006, v. 49 n. 9, p. 860-873 How to Cite?
AbstractPoor posture has been suggested as one of the main factors contributing to the high prevalence of neck pain in video display unit (VDU) users, but no clear association between pain and any particular resting neck posture has been found. Postural awareness of the neck, as indicated by the repositioning accuracy, may therefore be an appropriate measure and potentially useful assessment tool. The objective of this study is to examine whether posture and fatigue affect the head repositioning ability in typical VDU usage. A group of 20 healthy participants reproduced a normal comfortable posture for forward, upright and backward chair back inclinations in random order both before and after fatigue of the upper trapezius muscles. Ten repetitions of the posture were recorded for 2 s each, and the angular and translational deviations from the original head position were measured with regard to the external environment (head in space repositioning) and with regard to the trunk (head on trunk repositioning). Analysis by repeated measures ANOVA showed significant effects and interactions of fatigue and chair back inclination on the repositioning errors in the sagittal plane, which typically showed systematic trends towards certain postures rather than random errors around a mean position. While further work is required to examine the ergonomic impact of impaired repositioning ability, head repositioning is sensitive to ergonomic factors such as seating configuration and fatigue, and may therefore be a useful tool for evaluation of static working postures. © 2006 Taylor & Francis.
Persistent Identifierhttp://hdl.handle.net/10722/79567
ISSN
2015 Impact Factor: 1.449
2015 SCImago Journal Rankings: 0.962
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorWong, TFYen_HK
dc.contributor.authorChow, DHKen_HK
dc.contributor.authorHolmes, ADen_HK
dc.contributor.authorCheung, KMCen_HK
dc.date.accessioned2010-09-06T07:56:07Z-
dc.date.available2010-09-06T07:56:07Z-
dc.date.issued2006en_HK
dc.identifier.citationErgonomics, 2006, v. 49 n. 9, p. 860-873en_HK
dc.identifier.issn0014-0139en_HK
dc.identifier.urihttp://hdl.handle.net/10722/79567-
dc.description.abstractPoor posture has been suggested as one of the main factors contributing to the high prevalence of neck pain in video display unit (VDU) users, but no clear association between pain and any particular resting neck posture has been found. Postural awareness of the neck, as indicated by the repositioning accuracy, may therefore be an appropriate measure and potentially useful assessment tool. The objective of this study is to examine whether posture and fatigue affect the head repositioning ability in typical VDU usage. A group of 20 healthy participants reproduced a normal comfortable posture for forward, upright and backward chair back inclinations in random order both before and after fatigue of the upper trapezius muscles. Ten repetitions of the posture were recorded for 2 s each, and the angular and translational deviations from the original head position were measured with regard to the external environment (head in space repositioning) and with regard to the trunk (head on trunk repositioning). Analysis by repeated measures ANOVA showed significant effects and interactions of fatigue and chair back inclination on the repositioning errors in the sagittal plane, which typically showed systematic trends towards certain postures rather than random errors around a mean position. While further work is required to examine the ergonomic impact of impaired repositioning ability, head repositioning is sensitive to ergonomic factors such as seating configuration and fatigue, and may therefore be a useful tool for evaluation of static working postures. © 2006 Taylor & Francis.en_HK
dc.languageengen_HK
dc.publisherTaylor & Francis Ltd. The Journal's web site is located at http://www.tandf.co.uk/journals/titles/00140139.aspen_HK
dc.relation.ispartofErgonomicsen_HK
dc.subjectBackrest inclinationen_HK
dc.subjectBiomechanicsen_HK
dc.subjectFatigueen_HK
dc.subjectHead repositioningen_HK
dc.titleThe feasibility of repositioning ability as a tool for ergonomic evaluation: Effects of chair back inclination and fatigue on head repositioningen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0014-0139&volume=49&issue=9&spage=860&epage=873&date=2006&atitle=The+feasibility+of+repositioning+ability+as+a+tool+for+ergonomic+evaluation:+effects+of+chair+back+inclination+and+fatigue+on+head+repositioningen_HK
dc.identifier.emailCheung, KMC:cheungmc@hku.hken_HK
dc.identifier.authorityCheung, KMC=rp00387en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1080/00140130600577460en_HK
dc.identifier.pmid16801232-
dc.identifier.scopuseid_2-s2.0-33745566065en_HK
dc.identifier.hkuros136855en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-33745566065&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume49en_HK
dc.identifier.issue9en_HK
dc.identifier.spage860en_HK
dc.identifier.epage873en_HK
dc.identifier.isiWOS:000238612300004-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridWong, TFY=14027628400en_HK
dc.identifier.scopusauthoridChow, DHK=7103203940en_HK
dc.identifier.scopusauthoridHolmes, AD=7401687268en_HK
dc.identifier.scopusauthoridCheung, KMC=7402406754en_HK

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