Effects of supramaximal exercise on the electromyographic signal

Hunter, Andrew, St Clair Gibson, Alan, Lambert, Mike I., Nobbs, Les and Noakes, Timothy (2003) Effects of supramaximal exercise on the electromyographic signal. British Journal of Sports Medicine, 37 (4). pp. 296-299. ISSN 0306-3674

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Abstract

Aim: To determine the neuromuscular recruitment characteristics during supramaximal exercise. Methods: Ten healthy subjects completed the Wingate anaerobic test (WAT) cycling protocol. Electromyographic (EMG) data and rate of fatigue were recorded throughout the cycling. Results: The mean (SD) rate of fatigue (decrease in power output) was 44.5 (8.6)%. No significant change was found in EMG amplitude. A significant decrease (p<0.01) in mean power frequency spectrum was found over the 30 second period. Conclusions: During WAT, mean power frequency spectrum was attenuated with no decline in EMG amplitude, which may be caused by an accumulation of metabolites in the periphery. However, it is also possible that the feedback loop from intramuscular metabolism to the central nervous system is unable, within the 30 second period of the WAT, to affect neural recruitment strategy.

Item Type:	Article
Uncontrolled Keywords:	Fatigue
Subjects:	C600 Sports Science
Department:	Faculties > Health and Life Sciences > Sport, Exercise and Rehabilitation
Depositing User:	EPrint Services
Date Deposited:	07 May 2010 15:21
Last Modified:	31 Jul 2021 08:39
URI:	http://nrl.northumbria.ac.uk/id/eprint/626

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