Document Detail

The use of lumbar spinal stabilization techniques during the performance of abdominal strengthening exercise variations.
MedLine Citation:
PMID:  16208289     Owner:  NLM     Status:  MEDLINE    
AIM: The lumbar spinal stabilization techniques in abdominal hollowing and bracing are known to facilitate the level of activity in the muscles transversus abdominis and obliquus internus (TA/OI). The relative timing of activation and the effect of combination with other tasks are currently unknown. The objective of this study was to determine whether the performance of abdominal hollowing and bracing could promote the voluntary preferential recruitment of TA/OI muscles when performed prior to abdominal strengthening exercise variations. METHODS: The trunk muscles TA/OI, rectus abdominis and obliquus externus were investigated using surface EMG. A pressure transducer under the lumbar spine detected spinal movement. Eighteen male subjects performed a series of 4 abdominal strengthening exercise variations. Pressure cuff and electromyographic onset times were collected and analyzed. RESULTS: TA/OI muscle site was recruited significantly earlier than the upper rectus abdominis site for the hollow with curl exercise. The TA/OI site was also ranked as first activated site in the majority of subjects during exercises where stabilization techniques of hollowing and bracing were used. CONCLUSIONS: Abdominal hollowing was an effective method for selective preferential voluntary recruitment of TA/OI site prior to the performance of the curl type abdominal strengthening exercise variation. The other variations brace with curl and hold and hollow with rotation also tend to recruit TA/OI site first, however the timing was not significantly different.
F Barnett; W Gilleard
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The Journal of sports medicine and physical fitness     Volume:  45     ISSN:  0022-4707     ISO Abbreviation:  J Sports Med Phys Fitness     Publication Date:  2005 Mar 
Date Detail:
Created Date:  2005-10-06     Completed Date:  2006-10-13     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0376337     Medline TA:  J Sports Med Phys Fitness     Country:  Italy    
Other Details:
Languages:  eng     Pagination:  38-43     Citation Subset:  IM    
Institute of Sport and Exercise Science, James Cook University, Townsville QLD, Australia.
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MeSH Terms
Abdominal Muscles / physiology*
Analysis of Variance
Exercise Therapy / methods*
Low Back Pain / physiopathology,  prevention & control
Lumbar Vertebrae / physiology*
Rectus Abdominis / physiology
Statistics, Nonparametric

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