Effects of supramaximal exercise on the electromyographic signal

Andrew Hunter; Alan St Clair Gibson; Mike I. Lambert; Les Nobbs; Timothy Noakes

doi:10.1136/bjsm.37.4.296

Effects of supramaximal exercise on the electromyographic signal

Andrew Hunter, Alan St Clair Gibson, Mike I. Lambert, Les Nobbs, Timothy Noakes

Northumbria University

Research output: Contribution to journal › Article › peer-review

77 Citations (Scopus)

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.

Original language	English
Pages (from-to)	296-299
Journal	British Journal of Sports Medicine
Volume	37
Issue number	4
DOIs	https://doi.org/10.1136/bjsm.37.4.296
Publication status	Published - Aug 2003

Keywords

Fatigue

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10.1136/bjsm.37.4.296

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title = "Effects of supramaximal exercise on the electromyographic signal",

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.",

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T1 - Effects of supramaximal exercise on the electromyographic signal

AU - Hunter, Andrew

AU - St Clair Gibson, Alan

AU - Lambert, Mike I.

AU - Nobbs, Les

AU - Noakes, Timothy

PY - 2003/8

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N2 - 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.

AB - 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.

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DO - 10.1136/bjsm.37.4.296

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VL - 37

SP - 296

EP - 299

JO - British Journal of Sports Medicine

JF - British Journal of Sports Medicine

IS - 4

ER -

Effects of supramaximal exercise on the electromyographic signal

Abstract

Keywords

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