Document Detail

Comparison of abdominal muscle activity during a single-legged hold in the hook-lying position on the floor and on a round foam roll.
MedLine Citation:
PMID:  21944072     Owner:  NLM     Status:  MEDLINE    
CONTEXT: To improve trunk stability or trunk muscle strength, many athletic trainers and physiotherapists use various types of unstable equipment for training. The round foam roll is one of those unstable pieces of equipment and may be useful for improving trunk stability.
OBJECTIVE: To assess the effect of the supporting surface (floor versus round foam roll) on the activity of abdominal muscles during a single-legged hold exercise performed in the hook-lying position on the floor and on a round foam roll.
DESIGN: Crossover study.
SETTING: University research laboratory.
PATIENTS OR OTHER PARTICIPANTS: Nineteen healthy volunteers (11 men, 8 women) from a university population.
INTERVENTION(S): The participants were instructed to perform a single-legged hold exercise while in the hook-lying position on the floor (stable surface) and on a round foam roll (unstable surface).
MAIN OUTCOME MEASURE(S): Surface electromyography (EMG) signals were recorded from the bilateral rectus abdominis, internal oblique, and external oblique muscles. Dependent variables were examined with a paired t test.
RESULTS: The EMG activities in all abdominal muscles were greater during the single-legged hold exercise performed on the round foam roll than on the stable surface.
CONCLUSIONS: The single-legged hold exercise in the hooklying position on an unstable supporting surface induced greater abdominal muscle EMG amplitude than the same exercise performed on a stable supporting surface. These results suggest that performing the single-legged hold exercise while in the hook-lying position on a round foam roll is useful for activating the abdominal muscles.
Su-Jung Kim; Oh-Yun Kwon; Chung-Hwi Yi; Hye-Seon Jeon; Jae-Seop Oh; Heon-Seock Cynn; Jong-Hyuck Weon
Publication Detail:
Type:  Journal Article; Randomized Controlled Trial; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of athletic training     Volume:  46     ISSN:  1938-162X     ISO Abbreviation:  J Athl Train     Publication Date:    2011 Jul-Aug
Date Detail:
Created Date:  2011-09-28     Completed Date:  2013-02-12     Revised Date:  2013-06-27    
Medline Journal Info:
Nlm Unique ID:  9301647     Medline TA:  J Athl Train     Country:  United States    
Other Details:
Languages:  eng     Pagination:  403-8     Citation Subset:  IM    
Department of Rehabilitation Therapy, Graduate School, Yonsei University, Kangwon-do, South Korea.
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MeSH Terms
Abdominal Muscles / innervation*,  physiology*
Cross-Over Studies
Exercise Test*
Supine Position / physiology*
Young Adult

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

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