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J Electromyogr Kinesiol. 2009 Dec;19(6):e529-35. doi: 10.1016/j.jelekin.2008.10.010. Epub 2008 Dec 6.

Repeated bout effect is absent in resistance trained men: an electromyographic analysis.

Author information

1
Program in Physical Therapy, Washington University School of Medicine, Campus Box 8502, 4444 Forest Park Ave., Saint Louis, MO 63108, USA. mjfalvo@wustl.edu

Abstract

A prior bout of exercise is well known to confer protection from subsequent eccentric bouts (i.e. repeated bout effect; RBE), which may be fostered through neural adaptations, specifically a shift in the frequency content of the surface electromyogram (EMG). It is currently not clear whether chronically resistance trained men are capable of a RBE driven by neural adaptations. Eleven resistance trained men (23.5+/-3.4 yrs) performed 100 eccentric actions of the barbell bench press exercise, followed by an equivalent bout 14 days later. Indirect markers of muscle damage (i.e. force production, soreness) along with surface EMG were measured before and through 48 h of recovery. Median frequency and maximal isometric force demonstrated time main effects (p>0.05), but no RBE. A prior bout of eccentric exercise does not confer a RBE for indirect markers of muscle injury or elicit changes in the frequency content of the EMG signal in resistance trained men.

PMID:
19059793
PMCID:
PMC2783719
DOI:
10.1016/j.jelekin.2008.10.010
[Indexed for MEDLINE]
Free PMC Article

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