Document Detail


Effect of pre-exhaustion exercise on lower-extremity muscle activation during a leg press exercise.
MedLine Citation:
PMID:  12741886     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The purpose of this study was to investigate the effect of pre-exhaustion exercise on lower-extremity muscle activation during a leg press exercise. Pre-exhaustion exercise, a technique frequently used by weight trainers, involves combining a single-joint exercise immediately followed by a related multijoint exercise (e.g., a knee extension exercise followed by a leg press exercise). Seventeen healthy male subjects performed 1 set of a leg press exercise with and without pre-exhaustion exercise, which consisted of 1 set of a knee extension exercise. Both exercises were performed at a load of 10 repetitions maximum (10 RM). Electromyography (EMG) was recorded from the rectus femoris, vastus lateralis, and gluteus maximus muscles simultaneously during the leg press exercise. The number of repetitions of the leg press exercise performed by subjects with and without pre-exhaustion exercise was also documented. The activation of the rectus femoris and the vastus lateralis muscles during the leg press exercise was significantly less when subjects were pre-exhausted (p < 0.05). No significant EMG change was observed for the gluteus maximus muscle. When in a pre-exhausted state, subjects performed significantly (p < 0.001) less repetitions of the leg press exercise. Our findings do not support the popular belief of weight trainers that performing pre-exhaustion exercise is more effective in order to enhance muscle activity compared with regular weight training. Conversely, pre-exhaustion exercise may have disadvantageous effects on performance, such as decreased muscle activity and reduction in strength, during multijoint exercise.
Authors:
Jesper Augustsson; Roland Thomeé; Per Hörnstedt; Jens Lindblom; Jon Karlsson; Gunnar Grimby
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of strength and conditioning research / National Strength & Conditioning Association     Volume:  17     ISSN:  1064-8011     ISO Abbreviation:  J Strength Cond Res     Publication Date:  2003 May 
Date Detail:
Created Date:  2003-05-13     Completed Date:  2003-10-01     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  9415084     Medline TA:  J Strength Cond Res     Country:  United States    
Other Details:
Languages:  eng     Pagination:  411-6     Citation Subset:  IM    
Affiliation:
Department of Rehabilitation Medicine, Göteborg University, Göteborg, Sweden 41345. jesper.augustsson@rehab.gu.se
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MeSH Terms
Descriptor/Qualifier:
Adult
Biomechanics
Cohort Studies
Electromyography
Exercise Test / methods*
Humans
Isometric Contraction / physiology
Knee Joint / physiology*
Lower Extremity
Male
Muscle, Skeletal / physiology*
Musculoskeletal Physiological Phenomena
Physical Exertion / physiology*
Probability
Stress, Mechanical
Weight Lifting / physiology*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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