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Consistent individual motor variability traits demonstrated by females performing a long-cycle assembly task under conditions differing in temporal organisation
University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational Health Science and Psychology, Occupational Health Science. University of Gävle, Centre for Musculoskeletal Research.ORCID iD: 0000-0003-2939-0236
Department of Industrial and Systems Engineering, Virginia Tech, Blacksburg, Virginia, USA.ORCID iD: 0000-0001-9327-6177
University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational Health Science and Psychology, Occupational Health Science. University of Gävle, Centre for Musculoskeletal Research.ORCID iD: 0000-0003-1443-6211
2020 (English)In: Applied Ergonomics, ISSN 0003-6870, E-ISSN 1872-9126, Vol. 85, article id 103046Article in journal (Refereed) Published
Abstract [en]

Research suggests an association between motor variability (MV) during repetitive work and work-related musculoskeletal disorders (MSDs). However, whether MV is a consistent individual trait, even across working conditions or tasks, remains unknown. This study assessed whether individual MV traits were consistent during complex work performed under different temporal conditions. Fifteen women performed cyclic assembly under four conditions differing in pace and organisation (line-type, batch-type). MV of trapezius muscle activity and upper arm elevation was quantified and partitioned into variance components. For all MV metrics, a non-zero between-subjects variance was found, indicating consistent individual MV traits across conditions. Variance between subjects was higher for electromyography (EMG) MV metrics compared with kinematic metrics. Our results showed individuals exhibited consistent MV traits across working conditions differing in pace and production process. Further research is needed to understand whether MV is an individual predictive factor for MSD onset or progression.

Place, publisher, year, edition, pages
Elsevier , 2020. Vol. 85, article id 103046
Keywords [en]
motor control, trapezius electromyography, upper arm elevation angle
National Category
Occupational Health and Environmental Health
Research subject
Health-Promoting Work
Identifiers
URN: urn:nbn:se:hig:diva-30605DOI: 10.1016/j.apergo.2020.103046ISI: 000526996900009PubMedID: 32174342OAI: oai:DiVA.org:hig-30605DiVA, id: diva2:1346648
Part of project
Forte-centre Working Life: The Body at Work - from problem to potential, Forte
Funder
Forte, Swedish Research Council for Health, Working Life and Welfare, 2009-1761Available from: 2019-08-28 Created: 2019-08-28 Last updated: 2020-05-07Bibliographically approved

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Jackson, JennieMathiassen, Svend Erik

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