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Which type of repetitive muscle contractions induces a greater acute impairment of position sense?

Fortier, Sylvie and Basset, Fabien A and Billaut, Francois and Behm, David and Teasdale, Normand (2010) Which type of repetitive muscle contractions induces a greater acute impairment of position sense? Journal of Electromyography and Kinesiology, 20 (2). pp. 298-304. ISSN 1050-6411

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Abstract

The objective of this study was to determine which type of repetitive muscle contractions induces a greater acute impairment of elbow position sense. Eleven male subjects participating in the study underwent (i) an exercise task (ET) consisting of 9 sets of 10 voluntary isometric, concentric, or eccentric contractions randomly performed on three separate sessions, and (ii) a pre- and post-exercise maximal voluntary isometric contraction (iMVC). Prior to and between sets of ET, a proprioception task (PT) consisting of matching the right arm to the left reference arm was performed at three different target angular positions (70�, 110� and 150�). Each ET was immediately followed by 3 PT and 1 min rest. The statistical analysis revealed that post-exercise iMVCs were significantly decreased compared to pre-exercise iMVC in all conditions with a greater drop following the eccentric task. Despite this greater drop, position sense was significantly affected by the concentric exercise task. In addition, the spectral EMG signals significantly shifted towards lower frequencies from the initial values, regardless of exercise task. The results showed that concentric muscle contractions impaired position sense to a greater extent compared to isometric and eccentric contractions.

Item Type: Article
Uncontrolled Keywords: ResPubID21960, elbow, muscle contraction, position sense, force, matching
Subjects: Faculty/School/Research Centre/Department > Institute of Sport, Exercise and Active Living (ISEAL)
FOR Classification > 1106 Human Movement and Sports Science
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Depositing User: VUIR
Date Deposited: 13 Dec 2011 02:43
Last Modified: 27 Jan 2015 22:11
URI: http://vuir.vu.edu.au/id/eprint/7931
DOI: 10.1016/j.jelekin.2009.04.002
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Citations in Scopus: 6 - View on Scopus

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