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The size of cycle-to-cycle variability in biomechanical exposure among butchers performing a standardized cutting task
Högskolan i Gävle, Centrum för belastningsskadeforskning.ORCID-id: 0000-0003-1443-6211
2008 (Engelska)Ingår i: Ergonomics, ISSN 0014-0139, E-ISSN 1366-5847, Vol. 51, nr 7, s. 1078-1095Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

The effects of employment duration and pain development on motor variability were investigated during repetitive work. EMG and kinematics data from two previous studies were reanalyzed. Newly employed butchers were followed prospectively in relation to employment duration and pain development. Healthy butchers with long-term experience were compared with novices. The variability of the cycle time, EMG ratio, and arm and trunk movement was expressed as cycle-to-cycle standard deviations. During the first six months of employment, cycle time variability decreased, while posture and movement variability increased (P<0.05). In presence of pain, the variability of the initial arm position decreased while it increased for the trunk (P<0.05). Experienced butchers showed a larger variability than novices for work cycle and several kinematic variables, but a smaller EMG ratio variability (P<0.05). These findings indicate that the variability of motor patterns in repetitive work change with experience and pain. A change towards a more variable motor strategy may protect workers from work-related musculoskeletal disorders.

Ort, förlag, år, upplaga, sidor
2008. Vol. 51, nr 7, s. 1078-1095
Nyckelord [en]
Variations, work experience, motor control, pain, work-related musculoskeletal disorders
Nationell ämneskategori
Arbetsmedicin och miljömedicin
Identifikatorer
URN: urn:nbn:se:hig:diva-2152DOI: 10.1080/00140130801958659ISI: 000256994600010PubMedID: 18568966Scopus ID: 2-s2.0-46249091433OAI: oai:DiVA.org:hig-2152DiVA, id: diva2:118814
Tillgänglig från: 2008-06-24 Skapad: 2008-06-24 Senast uppdaterad: 2018-03-13Bibliografiskt granskad

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Mathiassen, Svend Erik

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