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Sökning: WFRF:(Sundelin Gunnevi) > Lindkvist Markus

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  • Åström, Charlotte, et al. (författare)
  • Changes in EMG activity in the upper trapezius muscle due to local vibration exposure.
  • 2009
  • Ingår i: Journal of Electromyography & Kinesiology. - : Elsevier BV. - 1050-6411 .- 1873-5711. ; 19:3, s. 407-415
  • Tidskriftsartikel (refereegranskat)abstract
    • Exposure to vibration is suggested as a risk factor for developing neck and shoulder disorders in working life. Mechanical vibration applied to a muscle belly or a tendon can elicit a reflex muscle contraction, also called tonic vibration reflex, but the mechanisms behind how vibration could cause musculoskeletal disorders has not yet been described. One suggestion has been that the vibration causes muscular fatigue. This study investigates whether vibration exposure changes the development of muscular fatigue in the trapezius muscle. Thirty-seven volunteers (men and women) performed a sub-maximal isometric shoulder elevation for 3min. This was repeated four times, two times with induced vibration and two times without. Muscle activity was measured before and after each 3-min period to look at changes in the electromyography parameters. The result showed a significantly smaller mean frequency decrease when performing the shoulder elevation with vibration (-2.51Hz) compared to without vibration (-4.04Hz). There was also a slightly higher increase in the root mean square when exposed to vibration (5.7% of maximal voluntary contraction) compared to without (3.8% of maximal voluntary contraction); however, this was not statistically significant. The results of the present study indicate that short-time exposure to vibration has no negative acute effects on the fatiguing of upper trapezius muscle.
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  • Resultat 1-3 av 3
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annan publikation (2)
tidskriftsartikel (1)
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övrigt vetenskapligt/konstnärligt (2)
refereegranskat (1)
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Sundelin, Gunnevi (3)
Burström, Lage (3)
Åström, Charlotte (3)
Karlsson, Stefan (2)
Karlsson, J Stefan (1)
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