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Oxygenation and hemodynamics do not underlie early muscle fatigue for patients with work-related muscle pain
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, Rehabilitation medicine, Umeå University, Umeå, Sweden.
Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning. Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden.
Högskolan i Gävle, Akademin för hälsa och arbetsliv, Avdelningen för arbets- och folkhälsovetenskap, Arbetshälsovetenskap. Högskolan i Gävle, Centrum för belastningsskadeforskning.ORCID-id: 0000-0002-2741-1868
5 Department of Community Medicine and Rehabilitation, Physiotherapy, Umeå University, Umeå, Sweden.
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2014 (engelsk)Inngår i: PLoS ONE, ISSN 1932-6203, E-ISSN 1932-6203, Vol. 9, nr 4, s. e95582-Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Patients suffering from work-related muscle pain (WRMP) fatigue earlier during exercise than healthy controls. Inadequate oxygen consumption and/or inadequate blood supply can influence the ability of the muscles to withstand fatigue. However, it remains unknown if oxygenation and hemodynamics are associated with early fatigue in muscles of WRMP patients. In the present study we applied near-infrared spectroscopy (NIRS) on the extensor carpi radialis (ECR) and trapezius (TD) muscles of patients with WRMP (n = 18) and healthy controls (n = 17). Our objective was to determine if there were group differences in endurance times for a low-level contraction of 15% maximal voluntary contraction (MVC) – sustained for 12-13 min, and to see if these differences were associated with differences in muscle oxygenation and hemodynamics. At baseline, oxygen saturation (StO2%) was similar between groups for the ECR, but StO2% was significantly lower for TD for the WRMP patients (76%) compared to controls (85%) (P < 0.01). Also, baseline ECR blood flow was similar in the two groups. For both muscles there were a larger number of patients, compared to controls, that did not maintain the 15% MVC for the allotted time. Consequently, the endurance times were significantly shorter for the WRMP patients than controls (medians, ECR: 347 s vs. 582 s; TD: 430 s vs. 723 s respectively). Responses in StO2% during the contractions were not significantly different between groups for either muscle, i.e. no apparent difference in oxygen consumption. Overall, we interpret our findings to indicate that the early fatigue for our WRMP patients was not associated with muscle oxygenation and hemodynamics.

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2014. Vol. 9, nr 4, s. e95582-
Emneord [en]
Near Infrared Spectroscopy, Electromyography, muscle pain, trapezius, extensor carpi radialis, oxygenation, hemodynamics, fatigue
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Identifikatorer
URN: urn:nbn:se:hig:diva-16596DOI: 10.1371/journal.pone.0095582ISI: 000335240300056PubMedID: 24755957Scopus ID: 2-s2.0-84899705131OAI: oai:DiVA.org:hig-16596DiVA, id: diva2:715005
Tilgjengelig fra: 2014-04-30 Laget: 2014-04-30 Sist oppdatert: 2018-03-13bibliografisk kontrollert

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