Research article summary (published 30 Jul 2003):

Effects of supramaximal exercise on the electromyographic signal.

Full 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.

Author information

Author/s: Hunter, A M (AM); St Clair Gibson, A (A); Lambert, M I (MI); Nobbs, L (L); Noakes, T D (TD);

Affiliation: MRC/UCT Research Unit of Exercise Science and Sports Medicine, Department of Human Biology, University of Cape Town, Cape town, South Africa. a.m.hunter1(-atsign-)stir.ac.uk

Journal and publication information

Publication Type: Journal Article; Research Support, Non-U.S. Gov't

Journal: British journal of sports medicine (Br J Sports Med), published in England. (Language: eng)

Reference: 2003-Aug; vol 37 (issue 4) : pp 296-9

Dates: Created 2003/08/01; Completed 2003/10/09; Revised 2008/11/20;

PMID: 12893711, status: MEDLINE (last retrieval date: 2/18/2009, IMS Date: )

Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.

Comments and Corrections

CommentIn: Br J Sports Med. 2004 Jun;38(3):364-5. (PMID: 15155449)

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MeSH headings (categories)

This article was linked to the MESH Headings shown below.

Adult Bicycling - physiology Electromyography Exercise - physiology Exercise Test - methods

Humans Male Muscle Contraction - physiology Muscle Fatigue - physiology Recruitment, Neurophysiological

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