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Position sense acuity is diminished following repetitive low-intensity work to fatigue in a simulated occupational setting
Centre for Musculoskeletal Research, National Institute for Working Life, Umeå Sweden.ORCID-id: 0000-0001-7543-4397
Centre for Musculoskeletal Research, National Institute for Working Life, Umeå Sweden.
Centre for Musculoskeletal Research, National Institute for Working Life, Umeå Sweden.
Centre for Musculoskeletal Research, National Institute for Working Life, Umeå Sweden.
2000 (engelsk)Inngår i: European Journal of Applied Physiology and Occupational Physiology, ISSN 0301-5548, E-ISSN 1432-1025, Vol. 81, s. 361-367Artikkel i tidsskrift (Annet vitenskapelig) Published
Abstract [en]

Repetitive work to fatigue is soundly associated with work-related musculoskeletal disorders (WMSD), although the underlying mechanisms are poorly understood. In the present study, we tested the hypothesis that fatiguing work leads to proprioceptive deficits, which can be an initiating factor for the occurrence of WMSD. Thus, the position sense of the shoulder was determined for 13 males and 13 females before and after performing repetitive low-intensity arm work to fatigue in a simulated occupational setting. From a starting position of 45grader to the sagittal plane, position sense tests consisted of subjects attempting to actively reproduce target positions of horizontal move- ments to 15grader and 30grader (shoulder adduction) and to 60grader and 75grader (shoulder abduction). An analysis of variance revealed that the absolute error was significantly increased following fatigue for the subjects as a group (P < 0.001). Furthermore, females had an overall higher error than males (P < 0.01). No difference in error was detected for the shorter movements versus the longer movements. However, the overall absolute error for adduction was significantly higher than for abduc- tion (P < 0.001). The results of the present study support the hypothesis of diminished proprioceptive acuity following low-intensity work to fatigue. A reduction in position sense acuity could lead to impairment in motor control, which would further impact on position sense. Thus, a vicious cycle may be activated that might result in WMSD. The poorer position sense acuity observed for females may contribute to the explanation of why females may contribute to explanation of why females demonstrate a higher incidence of WMSD than males. Key Words: Fatigue, Glenohumeral joint, human, Occupational musculoskeletal problems,Proprioception.

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2000. Vol. 81, s. 361-367
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URN: urn:nbn:se:hig:diva-7757OAI: oai:DiVA.org:hig-7757DiVA, id: diva2:355783
Tilgjengelig fra: 2010-10-08 Laget: 2010-10-08 Sist oppdatert: 2018-03-13bibliografisk kontrollert

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