Journal
JOURNAL OF ELECTROMYOGRAPHY AND KINESIOLOGY
Volume 19, Issue 6, Pages E529-E535Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jelekin.2008.10.010
Keywords
Repeated bout effect; Muscle damage; EMG; Eccentric exercise; Bench press
Categories
Funding
- National Strength and Conditioning Association (NSCA)
- Jarrow Formulas
- National Institute of Child Health and Human Development [T32HD007434]
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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. (C) 2008 Elsevier Ltd. All rights reserved.
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