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Effect of oral glucose supplementation on surface EMG during fatiguing dynamic exercise


Clare Davidson, Giuseppe De Vito, Madeleine Lowery

Publication Type: 
Refereed Conference Meeting Proceeding
Abstract—The aim of this study was to examine the effect of oral glucose supplementation on the surface electromyographic (sEMG) signal recorded during a dynamic, fatiguing exercise protocol. Five healthy subjects participated in the study. Blood glucose concentration and sEMG signals from five upper leg muscles were recorded during a cycling exercise performed at 70% V O˙ 2peak until task failure, on two separate occasions. Glucose was consumed at 15 minute intervals throughout one trial. The median frequency of the sEMG was observed to increase progressively throughout the exercise, with a greater increase in the with glucose condition. This is in direct contrast to the typical decrease in median frequency known to occur during a fatiguing isometric contraction. The result may indicate an increase in Na+ − K+ − AT P ase activity during fatiguing dynamic exercise resulting in an increase in muscle fiber membrane excitability due to membrane hyperpolarization.
Conference Name: 
IEEE Engineering in Medicine and Biology Conference 2016.
Digital Object Identifer (DOI): 
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Research Group: 
National University of Ireland, Dublin (UCD)
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