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Influence of posture variation on maximal acceptable work pace in a repetitive manual task
University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational and Public Health Sciences. University of Gävle, Centre for Musculoskeletal Research.
University of Gävle, Faculty of Health and Occupational Studies, Department of Occupational and Public Health Sciences. University of Gävle, Centre for Musculoskeletal Research.ORCID iD: 0000-0003-1443-6211
TNO, Leiden.
Department of Human Movement Sciences, Faculty of Behavioural and Movement Sciences, Vrije Universiteit Amsterdam.
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2016 (English)In: Applied Ergonomics, ISSN 0003-6870, E-ISSN 1872-9126Article in journal (Refereed) Submitted
Abstract [en]

We investigated the effect of upper arm posture variation in a repetitive pick-and-place task on maximal acceptable work pace (MAWP), muscle activity, heart rate and perceived exertion. Thirteen healthy subjects performed the task in three experimental conditions with an average upper arm elevation of 30° where the hand was moved either horizontal (H30/30), diagonal (D20/40), or vertical (V10/50). In a fourth condition, the hand was moved horizontally at 50° average arm elevation (H50/50). As intended, posture variation differed between H30/30, D20/40, and V10/50, but MAWP (10.7 cycles/min; determined in a psychophysical approach), average upper trapezius activity (54% RVE), and heart rate (69 bpm) did not. In H50/50, MAWP was lower (9.3 cycles/min), while trapezius activity (78% RVE) and perceived exertion tended to be higher. Our results indicate that biomechanical variation to the extent obtained in the current experiment leads to less effects on MAWP than a change in working height.

Place, publisher, year, edition, pages
2016.
Keyword [en]
maximal acceptable work pace; exposure variation; arm elevation; repetitive work; muscle activity
National Category
Environmental Health and Occupational Health
Identifiers
URN: urn:nbn:se:hig:diva-21295OAI: oai:DiVA.org:hig-21295DiVA: diva2:909089
Available from: 2016-03-04 Created: 2016-03-04 Last updated: 2016-10-10Bibliographically approved

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Luger, TessyMathiassen, Svend Erik
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