Document Detail

Do exercise balls provide a training advantage for trunk extensor exercises? A biomechanical evaluation.
MedLine Citation:
PMID:  16762662     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: Only a few abdominal muscle exercises have been quantitatively evaluated on both a mat and exercise ball, but the benefits reported for the ball have been equivocally applied to all exercises. The purpose of this study is to evaluate differences in the biological response of muscle activation, lumbar spine posture, and loading variables for extensor exercises performed on 2 surfaces. METHODS: Bilateral muscle activation was recorded from 7 sites (rectus abdominis, external/internal obliques, latissimus dorsi, thoracic/lumbar erector spinae, and multifidus) on 8 subjects. Three-dimensional lumbar spine postures and upper body kinematics were recorded while the participants performed the exercises. An electromyography-driven model was used to calculate spinal loading. RESULTS: Cocontraction of trunk flexor and extensor muscles was reduced by up to 30% for the extension exercises when performed on the ball. Peak muscle activation remained unchanged or decreased, and spinal loading (compression and anterior-posterior shear) decreased when the extension exercises were performed on the ball. The lumbar spine postures attained during the exercises did not differ between surfaces. CONCLUSIONS: The assumption that the use of an exercise ball will always create a greater challenge for the musculoskeletal system was not supported by the findings of this study. Likewise, in a healthy, young population, there does not appear to be any training advantage to performing extensor exercises on a ball versus a mat. However, in a rehabilitation scenario, these exercises performed on a ball could reduce low back loading and hence reduce the potential for reinjury.
Janessa D M Drake; Steve L Fischer; Stephen H M Brown; Jack P Callaghan
Publication Detail:
Type:  Clinical Trial; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of manipulative and physiological therapeutics     Volume:  29     ISSN:  1532-6586     ISO Abbreviation:  J Manipulative Physiol Ther     Publication Date:  2006 Jun 
Date Detail:
Created Date:  2006-06-09     Completed Date:  2006-07-06     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  7807107     Medline TA:  J Manipulative Physiol Ther     Country:  United States    
Other Details:
Languages:  eng     Pagination:  354-62     Citation Subset:  IM    
Department of Kinesiology, Faculty of Applied Health Sciences, University of Waterloo, Ontario, Canada.
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MeSH Terms
Abdominal Muscles*
Analysis of Variance
Exercise / physiology*
Exercise Test / instrumentation*,  methods

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

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