Recovery of the first and second phases of the M wave after prolonged maximal voluntary contractions

We compared the recovery of muscle electrical properties after maximal voluntary contractions (MVCs) of 1 and 3 min duration by examining separately the first and second phases of the muscle compound action potential (M wave). M waves were evoked by supramaximal single shocks to the femoral nerve th...

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Bibliographic Details
Published in:Journal of electromyography and kinesiology 2020-02, Vol.50, p.102385-102385, Article 102385
Main Authors: Rodriguez-Falces, Javier, Malanda, Armando, Lavilla-Oiz, Ana, Navallas, Javier
Format: Article
Language:English
Subjects:
Fatigue
Femoral nerve stimulation
M wave
Membrane excitability
Quadriceps
Recovery
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Summary:We compared the recovery of muscle electrical properties after maximal voluntary contractions (MVCs) of 1 and 3 min duration by examining separately the first and second phases of the muscle compound action potential (M wave). M waves were evoked by supramaximal single shocks to the femoral nerve throughout the 30-min recovery following 1-min and 3-min MVCs. The amplitude, duration, and area of the M-wave first and second phases, along with peak-to-peak amplitude and total area, were measured from the knee extensors. (1) The amplitude of the M-wave first phase increased to the same extent (and had the same time course of recovery) after the 1 and 3-min MVCs, whereas the amplitude of the second phase increased more markedly after the 1-min than after the 3-min MVC (P 
ISSN:1050-6411
1873-5711
DOI:10.1016/j.jelekin.2019.102385