Document Detail


CORE MUSCLE ACTIVATION DURING DYNAMIC UPPER LIMB EXERCISES IN WOMEN.
MedLine Citation:
PMID:  22222323     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Although several everyday functions and sporting activities demand controlled use of the abdominal and back muscles while working with the upper limbs, the activity of core muscles during dynamic upper limb exercises in the standing position has not been studied extensively. The purpose of this cross-sectional study was to examine abdominal and back muscle activity during dynamic upper limb exercises while standing and to evaluate whether dynamic exercises are appropriate for strengthening muscles. The activation of the rectus abdominis, obliquus externus abdominis, longissimus, and multifidus muscles during dynamic bilateral or unilateral shoulder exercises with or without fixation of the pelvis was measured in 20 healthy women using surface electromyography (EMG). Trunk muscle activation during isometric maximum contraction was used as a comparative reference. With bilateral shoulder extension and unilateral shoulder horizontal adduction, abdominal muscle activity was more than 60% of activity during reference exercises. With unilateral shoulder horizontal abduction and shoulder extension exercises, back muscle activity was more than 60% of the activity level reference exercise. Muscle activation levels were 35-64% lower during shoulder horizontal adduction and abduction without fixation compared to exercises with fixation. The results indicate that upper limb exercises performed in the standing position are effective for activating core muscles. Bilateral and unilateral shoulder extension and unilateral shoulder horizontal abduction and adduction with the pelvis fixed elicited the greatest activity of the core muscles.
Authors:
Sami P Tarnanen; Kirsti M Siekkinen; Arja H Häkkinen; Esko A Mälkiä; Hannu J Kautiainen; Jari J Ylinen
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-1-03
Journal Detail:
Title:  Journal of strength and conditioning research / National Strength & Conditioning Association     Volume:  -     ISSN:  1533-4287     ISO Abbreviation:  -     Publication Date:  2012 Jan 
Date Detail:
Created Date:  2012-1-6     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9415084     Medline TA:  J Strength Cond Res     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
From the Department of Health Sciences, University of Jyväskylä, Jyväskylä, Finland (Tarnanen, Mälkiä, Häkkinen); LIKES Research Center for Sport and Health Sciences, Jyväskylä, Finland (Siekkinen); Unit of Family Practice, Central Finland Central Hospital, Jyväskylä, Finland (Kautiainen); Department of Physical Medicine and Rehabilitation, Central Finland Central Hospital, Jyväskylä, Finland (Häkkinen, Ylinen), Finland.
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