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Appears in Collections:Faculty of Health Sciences and Sport Journal Articles
Peer Review Status: Refereed
Title: Effects of supramaximal exercise on the electromyographic signal
Authors: Hunter, Angus
Gibson, Alan St Clair
Lambert, Michael
Nobbs, Les A
Noakes, Timothy D
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Issue Date: Aug-2003
Publisher: BMJ Publishing Group / British Association of Sport and Exercise Medicine / European College of Sports and Exercise Physicians
Citation: Hunter A, Gibson ASC, Lambert M, Nobbs LA & Noakes TD (2003) Effects of supramaximal exercise on the electromyographic signal, British Journal of Sports Medicine, 37 (4), pp. 296-299.
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 less than 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.
Type: Journal Article
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Affiliation: Sport
University of Cape Town
University of Cape Town
University of Cape Town
University of Cape Town

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