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Influence of work pace on upper extremity kinematics and muscle activity in a short-cycle repetitive pick-and-place task
Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning. TNO Leiden, Leiden, The Netherlands; Department of Human Movement Sciences, Faculty of Behavioural and Movement Sciences, VU University Amsterdam, MOVE Research Institute Amsterdam, Amsterdam, The Netherlands; Institute of Occupational and Social Medicine and Health Services Research, Faculty of Medicine, University Hospital, Eberhard Karls University Tübingen, Tübingen, Germany.
Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.ORCID-id: 0000-0003-1443-6211
Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning. Department of Industrial and Systems Engineering, Virginia Polytechnic Institute and State University, Blacksburg, USA.ORCID-id: 0000-0001-9327-6177
TNO Leiden, Leiden, The Netherlands; Department of Human Movement Sciences, Faculty of Behavioural and Movement Sciences, VU University Amsterdam, MOVE Research Institute Amsterdam, Amsterdam, The Netherlands.
2017 (engelsk)Inngår i: Annals of Occupational Hygiene, ISSN 0003-4878, E-ISSN 1475-3162, Vol. 61, nr 3, s. 356-368Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Aim: This study investigated the extent to which controlled changes in work pace in a cyclic pick-and-place task influence upper extremity kinematics and muscle activity, and whether an effect depends on working height. Methods: Thirteen participants performed the task four minutes at each of five work paces ranging from 8 to 12 cycles·min-1 in each of two experimental conditions where the hand was moved horizontally with an average upper arm elevation of 30° and 50°, respectively. For each work cycle, we calculated the average and standard deviation of the upper arm elevation angle and the activity of the trapezius and deltoid muscles, as well as the angular peak velocity. We summarized these seven variables by calculating averages across cycles and cycle-to-cycle variabilities. Results: At 30° arm elevation, pace significantly influenced within-cycle angle variation, cycle-to-cycle variability of the average angle, angular peak velocity, and cycle-to-cycle variability of peak velocity. However, only angular peak velocity increased monotonically across all paces from 8 to 12 cycles·min-1). Average activity in the trapezius and the deltoid were the only muscle activity variables to increase consistently with pace. These effects of work pace did not change with working height. Conclusion: The present study did not find any consistent work pace effect on upper extremity kinematics and muscle activity, in spite of a comprehensive empirical basis compared to previous literature. While our results suggest that work pace may not be of critical concern in an occupational health context, we encourage further studies verifying or disproving this notion.

sted, utgiver, år, opplag, sider
2017. Vol. 61, nr 3, s. 356-368
Emneord [en]
work pace, muscle activity, motor variability, upper arm elevation
HSV kategori
Identifikatorer
URN: urn:nbn:se:hig:diva-21507DOI: 10.1093/annweh/wxx001ISI: 000405570200009PubMedID: 28355412Scopus ID: 2-s2.0-85028733295OAI: oai:DiVA.org:hig-21507DiVA, id: diva2:929572
Forskningsfinansiär
Forte, Swedish Research Council for Health, Working Life and Welfare, 2009-1761Tilgjengelig fra: 2016-05-19 Laget: 2016-05-19 Sist oppdatert: 2018-09-05bibliografisk kontrollert

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