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Muscle activation is enhanced with multi- and uni-articular bilateral versus unilateral contractions

Behm, David G., Power, Kevin E. and Drinkwater, Eric J. 2003, Muscle activation is enhanced with multi- and uni-articular bilateral versus unilateral contractions, Canadian journal of applied physiology, vol. 28, no. 1, pp. 38-52, doi: 10.1139/h03-004.

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Title Muscle activation is enhanced with multi- and uni-articular bilateral versus unilateral contractions
Author(s) Behm, David G.
Power, Kevin E.
Drinkwater, Eric J.ORCID iD for Drinkwater, Eric J. orcid.org/0000-0002-9594-9360
Journal name Canadian journal of applied physiology
Volume number 28
Issue number 1
Start page 38
End page 52
Total pages 15
Publisher NRC Research Press
Place of publication Ottawa, Ont.
Publication date 2003-02
ISSN 1066-7814
1543-2718
Keyword(s) interpolated twitch technique
quadriceps
leg extensions
squat
isometric
electromyography
Summary Ten resistance trained (RT) and 6 non-resistance trained (NRT) subjects were used to determine differences in quadriceps activation between isometric single and double knee extensions and squat contractions. Greater inactivation, as measured by the interpolated twitch technique, was recorded with single (RT: 16.5%, NRT: 17.6%) than double leg extensions (RT: 8.4%, NRT: 13.4%) or squats (RT: 4.03%, NRT: 1.7%). There was no significant difference between the maximum voluntary contraction (MVC) force of the dominant leg during single and double leg extensions. However, in NRT subjects, the contralateral or non-dominant leg during double leg extensions exhibited significantly less force than the dominant leg (715.9 vs 566.9 N). This deficit may be due to a lesser reliance on the non-dominant limb. The contractions of multiple lower body muscle groups enhanced the activation of the dominant quadriceps. Greater levels of activation may be necessary to cope with the stabilization necessary for bilateral and multi-articular contractions.
Language eng
DOI 10.1139/h03-004
Field of Research 110699 Human Movement and Sports Science not elsewhere classified
Socio Economic Objective 929999 Health not elsewhere classified
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2003, Canadian Society for Exercise Physiology
Persistent URL http://hdl.handle.net/10536/DRO/DU:30083154

Document type: Journal Article
Collection: School of Exercise and Nutrition Sciences
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