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Influence of posture variation on shoulder muscle activity, heart rate, and perceived exertion in a repetitive manual task
Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.
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
TNO, Leiden, the Netherlands.
Department of Human Movement Sciences, Faculty of Behavioural and Movement Sciences, Vrije Universiteit Amsterdam, the Netherlands.
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2017 (Engelska)Ingår i: IISE Transactions on Occupational Ergonomics and Human Factors, ISSN 2472-5838, Vol. 5, s. 47-64Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Background: Repetitive light assembly work is associated with an increased risk for developing work-related musculoskeletal disorders. More exposure variation, for instance by redesigning the workstation, is generally proposed as an effective intervention. Purpose: We investigated the effect of upper arm posture variation in a one-hour repetitive pick-and-place task on shoulder muscle activity, heart rate and perceived exertion, measured on the Borg CR-10 scale and in terms of maximal acceptable work pace (MAWP). Methods: Thirteen healthy participants performed the task in three workstation designs where the hand was moved either horizontal (H30/30), diagonal (D20/40), or vertical (V10/50) with a mean upper arm elevation of ~30°. In a fourth design, the hand was moved horizontally at ~50° mean arm elevation (H50/50). Results: As intended, upper arm posture variation, measured by the upper arm elevation SD and range of motion, differed between H30/30, D20/40, and V10/50. However, MAWP (10.7 cycles·min-1 on average across conditions; determined using a psychophysical approach), average upper trapezius activity (54% reference voluntary exertion [RVE]), and heart rate (69 bpm) did not differ between these workstation designs. In H50/50, MAWP was lower (9.3 cycles·min-1), while trapezius activity (78% RVE) and perceived exertion (Borg CR-10) tended to be higher. Conclusions: Our results indicate that posture variation to the extent achieved in the current experiment leads to less effects on muscle activity and perceived exertion than a moderate change in working height.

Ort, förlag, år, upplaga, sidor
2017. Vol. 5, s. 47-64
Nyckelord [en]
maximal acceptable work pace; exposure variation; arm elevation; repetitive work; muscle activity
Nationell ämneskategori
Arbetsmedicin och miljömedicin
Identifikatorer
URN: urn:nbn:se:hig:diva-21295DOI: 10.1080/24725838.2017.1303655ISI: 000442411100001OAI: oai:DiVA.org:hig-21295DiVA, id: diva2:909089
Forskningsfinansiär
Forte, Forskningsrådet för hälsa, arbetsliv och välfärd, 2009-1761Tillgänglig från: 2016-03-04 Skapad: 2016-03-04 Senast uppdaterad: 2018-12-06Bibliografiskt granskad

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Luger, TessyMathiassen, Svend Erik

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