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Differences in motor variability among individuals performing a standardized short-cycle manual task
Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning. Department of Community Medicine and Rehabilitation, Physiotherapy, Umeå University, Umeå, Sweden.
Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.ORCID-id: 0000-0001-9327-6177
Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.ORCID-id: 0000-0002-5055-0698
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
2017 (engelsk)Inngår i: Human Movement Science, ISSN 0167-9457, E-ISSN 1872-7646, Vol. 51, s. 17-26Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Motor variability (MV) has been suggested to be a determinant of the risk for developing musculoskeletal disorders in repetitive work. In this study we examined whether individuals consistently differed in the extent of motor variability when performing a standardized short-cycle manual task. On three separate days, arm kinematics was recorded in 14 healthy subjects performing a pipetting task, transferring liquid from a pick-up tube to eight target tubes with a cycle time of 2.8 s. Cycle-to-cycle standard deviations (SD) of a large selection of shoulder and elbow kinematic variables, were processed using principal component analysis (PCA). Thereafter, between-subjects and between-days (within-subject) variance components were calculated using a random effects model for each of four extracted principal components. The results showed that MV differed consistently between subjects (95% confidence intervals of the between-subjects variances did not include zero) and that subjects differed consistently in MV between days. Thus, our results support the notion that MV may be a consistent personal trait, even though further research is needed to verify whether individuals rank consistently in MV even across tasks. If so, MV may be a candidate determinant of the risk of developing fatigue and musculoskeletal disorders in repetitive occupational work.

sted, utgiver, år, opplag, sider
2017. Vol. 51, s. 17-26
Emneord [en]
Kinematics, Repetitive task, Principal component analysis, Day-to-day variability, Between-subjects variability, Individual differences
HSV kategori
Identifikatorer
URN: urn:nbn:se:hig:diva-21889DOI: 10.1016/j.humov.2016.10.009ISI: 000393633800003PubMedID: 27821310Scopus ID: 2-s2.0-84994052099OAI: oai:DiVA.org:hig-21889DiVA, id: diva2:942376
Forskningsfinansiär
Forte, Swedish Research Council for Health, Working Life and Welfare, 2009–1761Forte, Swedish Research Council for Health, Working Life and Welfare, 2009-0103Forte, Swedish Research Council for Health, Working Life and Welfare, 2011–0075Tilgjengelig fra: 2016-06-23 Laget: 2016-06-23 Sist oppdatert: 2018-03-13bibliografisk kontrollert

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Sandlund, JonasSrinivasan, DivyaHeiden, MarinaMathiassen, Svend Erik

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