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Evaluation of repetitive isometric contractions on the heads of triceps brachii muscle during grip force exercise.
MedLine Citation:
PMID:  24990168     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
OBJECTIVES: Normally, surface electromyography electrodes are used to evaluate the activity of superficial muscles during various kinds of voluntary contractions of muscle fiber. The objective of the present study was to investigate the effect of repetitive isometric contractions on the three heads of the triceps brachii muscle during handgrip force exercise.
METHODS: Myoelectric signals were recorded from the lateral, long and medial heads of the triceps brachii muscle in 13 healthy males during maximal isometric contractions for 10 s of concurrent handgrip force and elbow extension. The subjects were asked to perform their contraction task five times with 3 minutes interval between two successive contractions.
RESULTS: Decreasing electromyographic activities were found for the lateral and long heads, and increasing for the medial head throughout the 5 different contractions. Electromyographic activities were found for the lateral head with mean=199.84, SD=7.65, CV=3.83%, the long head with mean=456.76, SD=18.10, CV=3.96%, and the medial head with mean=505.16, SD=8.47, CV=1.68%. Electromyographic activities among the three heads of triceps brachii were significantly different (F=3.82) at the alpha level of (p < 0.05).CONCLUSIONS: These findings support that repetitive isometric contractions decrease the contractile activity in the lateral and long heads, and increases in the medial head of the triceps brachii muscle during handgrip force exercise with full elbow extension, and the electromyographic activity changes are observed to be more significant at the long head as compared to the lateral and medial heads.
Authors:
Asraf Ali; Kenneth Sundaraj; R Badlishah Ahmad; Nizam Uddin Ahamed; Anamul Islam; Sebastian Sundaraj
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2014-7-2
Journal Detail:
Title:  Technology and health care : official journal of the European Society for Engineering and Medicine     Volume:  -     ISSN:  1878-7401     ISO Abbreviation:  Technol Health Care     Publication Date:  2014 Jul 
Date Detail:
Created Date:  2014-7-3     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9314590     Medline TA:  Technol Health Care     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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