Analysis Of Fatigue In The Three Heads Of The Triceps Brachii During Isometric Contractions At Various Effort Levels

Hussain, Jawad and Sundaraj, Kenneth and M. Subramaniam, Indra Devi and Lam, Chee Kiang (2019) Analysis Of Fatigue In The Three Heads Of The Triceps Brachii During Isometric Contractions At Various Effort Levels. Journal of Musculoskeletal Neuronal Interactions, 19 (3). 276 - 285. ISSN 1108-7161

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Abstract

Objective: The objective of this study was to investigate fatigue in the three heads of the triceps brachii (TB) muscle using surface electromyography (sEMG) obtained at 30%, 45% and 60% of maximal voluntary contraction (MVC). Methods: Twenty-five subjects performed isometric elbow extension until failure, and the rate of fatigue (ROF), time to fatigue (TTF) and normalized TTF (NTTF) were statistically analysed. Subsequently, the behaviour of root-mean-square (RMS), mean-power frequency (MPF) and median-power frequency (MDF) under pre-, onset-and post-fatigue conditions were compared. Results: The findings indicated that, among the heads, ROF was statistically significant at 30% and 45% MVC (P<0.05) but TTF and NTTF at all intensities was statistically insignificant (P>0.05). For every head, only TTF was statistically significant (P<0.05) at different intensities. MPF and MDF under pre-, onset-and post-fatigue conditions were statistically significant (P<0.05) among the heads at all intensities, whereas RMS showed no such behaviour. Conclusion: The investigated parameters reveal that the three heads of TB act independently before fatigue onset and appear to work in union after fatigue. Synergist head pairs exhibit similar spectral and temporal behaviour in contrast to the non-synergist TB head pair. We find spectral parameters to be more specific predictors of fatigue.

Item Type:	Article
Uncontrolled Keywords:	Isometric contractions, Muscle fatigue, Surface electromyography, Triceps brachii
Divisions:	Faculty of Electronics and Computer Engineering
Depositing User:	Sabariah Ismail
Date Deposited:	28 Oct 2020 12:06
Last Modified:	28 Oct 2020 12:06
URI:	http://eprints.utem.edu.my/id/eprint/24360
Statistic Details:	View Download Statistic

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