Movement restriction does not modulate sensory and perceptual effects of exercise-induced arm pain
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Date
2015
Authors
Hübscher, M.
Tu, S.
Stanton, T.
Moseley, L.G.
Wand, B.M.
Booth, J.
McAuley, J.H.
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European Journal of Applied Physiology, 2015; 115(5):1047-1055
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Abstract
Background Movement restriction has been proposed as an important modulator of changes in sensory and perceptual function and motor imagery performance that are observed in musculoskeletal pain syndromes. There are no empirical data to support this view.
Purpose The primary objective of this experiment was to determine the effects of movement restriction on local and widespread sensory, perceptual and motor imagery changes after exercise-induced muscular pain. Further objectives were to investigate whether changes in sensory perception are correlated with pain intensity and tactile acuity or motor imagery performance.
Methods In forty healthy volunteers, delayed onset muscle soreness (DOMS) of the non-dominant elbow flexors was induced using eccentric contractions until exhaustion.Participants were then randomised into two groups:a movement restriction group (wearing a sling) or a control group (not wearing a sling). Sensory and perceptual functions were measured using a range of sensory tests and a motor imagery performance task (left/right limb judgements).
Results Movement restriction did not modulate any of the measures. We found concurrent mechanical hypoesthesia (p < 0.01), reduced tactile acuity (p = 0.02) and pressure hyperalgesia (p < 0.01) at the painful side. We found evidence of widespread pressure hyperalgesia. Impaired tactile acuity was associated with a decrease in pain threshold to pressure (r = −0.34, p = 0.03). Motor imagery performance was unchanged (p > 0.35) by pain or movement restriction.
Conclusion Short-term movement restriction did notinfluence local and widespread sensory changes induced by experimentally induced muscular pain.
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Copyright 2015 Springer-Verlag
Access Condition Notes: Postprint will be available after 1 May 2016