Document Detail

Muscle activation of the torso during the modified razor curl hamstring exercise.
MedLine Citation:
PMID:  22319680     Owner:  NLM     Status:  PubMed-not-MEDLINE    
PURPOSE/BACKGROUND: The RAZOR curl has been introduced as a hamstring exercise. However, modifications to the exercise have been developed which are proposed to utilize some of the muscles of the lumbo-pelvic-hip complex. Thus, it was the purpose of this study to quantitatively examine the modified RAZOR curl using surface electromyography (sEMG), as an exercise that may recruit the trunk muscles of the lumbo-pelvic-hip complex.
METHODS: Twenty-eight active male and female graduate students (24.2±1.3 years; 174.8±9.9 cm; 74.9±14.9 kg), consented to participate. Dependent variables were muscle activation of trunk musculature (dominant side gluteus medius, gluteus maximus, multifidus, longissimus, lower rectus abdominis, upper rectus abdominis, external obliques) reported as percent of maximum voluntary isometric contraction (%MVIC) during the exercise while the independent variable was the muscle selected.
RESULTS: The multifidus and longissimus demonstrated moderately strong activation (35-50%MVIC) while the upper rectus abdominis demonstrated strong activation (20-35%MVIC) and the gluteus medius, gluteus maximus, lower rectus abdominis, and external obliques had minimal activation.
CONCLUSIONS: These findings allow the practitioner to utilize an exercise that provides a functional training stimulus that activates not only the hamstrings but also some musculature of the trunk muscles of the lumbopelvic-hip complex at strong to moderately strong levels.
Gretchen D Oliver; Audrey J Stone; James W Wyman; Ivan N Blazquez
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  International journal of sports physical therapy     Volume:  7     ISSN:  2159-2896     ISO Abbreviation:  Int J Sports Phys Ther     Publication Date:  2012 Feb 
Date Detail:
Created Date:  2012-02-09     Completed Date:  2012-10-02     Revised Date:  2013-05-29    
Medline Journal Info:
Nlm Unique ID:  101553140     Medline TA:  Int J Sports Phys Ther     Country:  United States    
Other Details:
Languages:  eng     Pagination:  49-57     Citation Subset:  -    
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