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

Introduction: 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). Methods: M waves were evoked by supramaximal single shocks...

Descripción completa

Detalles Bibliográficos
Autores: Rodríguez Falces, Javier, Malanda Trigueros, Armando, Lavilla Oiz, Ana, Navallas Irujo, Javier
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2019
País:España
Institución:Universidad Pública de Navarra
Repositorio:Academica-e. Repositorio Institucional de la Universidad Pública de Navarra
OAI Identifier:oai:academica-e.unavarra.es:2454/55561
Acceso en línea:https://hdl.handle.net/2454/55561
Access Level:acceso abierto
Palabra clave:M wave
Recovery
Femoral nerve stimulation
Quadriceps
Fatigue
Membrane excitability
id ES_b8ccaf09503b0d530bbd2d3cdd38ccda
oai_identifier_str oai:academica-e.unavarra.es:2454/55561
network_acronym_str ES
network_name_str España
repository_id_str
spelling Recovery of the first and second phases of the M wave after prolonged maximal voluntary contractionsRodríguez Falces, JavierMalanda Trigueros, ArmandoLavilla Oiz, AnaNavallas Irujo, JavierM waveRecoveryFemoral nerve stimulationQuadricepsFatigueMembrane excitabilityIntroduction: 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). Methods: 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. Results: (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 < 0.05). (2) The first phase remained enlarged for 2 min after exercise, whereas the augmentation of the second phase only lasted for 30 s. (3) After 30 min of recovery, the amplitude, area, and duration of both the first and second phases were decreased compared to control values (P < 0.05). Conclusions: The similar enlargement of the M-wave first phase after the 1 and 3-min MVCs suggests that the extracellular K+ concentration attained after these contractions was similar. The mechanisms responsible for the long-term decreases in M-wave amplitude and duration are unknown at present, but are likely due to a decrease in the amplitude of individual transmembrane potentials and an increase in conduction velocity.ElsevierIngeniería Eléctrica, Electrónica y de ComunicaciónIngeniaritza Elektrikoa, Elektronikoa eta Telekomunikazio Ingeniaritza2019info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersionapplication/pdfhttps://hdl.handle.net/2454/55561reponame:Academica-e. Repositorio Institucional de la Universidad Pública de Navarrainstname:Universidad Pública de NavarraInglés© 2020 Elsevier Ltd. This manuscript version is made available under the CC-BY-NC-ND 4.0https://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessoai:academica-e.unavarra.es:2454/555612026-06-17T12:41:47Z
dc.title.none.fl_str_mv Recovery of the first and second phases of the M wave after prolonged maximal voluntary contractions
title Recovery of the first and second phases of the M wave after prolonged maximal voluntary contractions
spellingShingle Recovery of the first and second phases of the M wave after prolonged maximal voluntary contractions
Rodríguez Falces, Javier
M wave
Recovery
Femoral nerve stimulation
Quadriceps
Fatigue
Membrane excitability
title_short Recovery of the first and second phases of the M wave after prolonged maximal voluntary contractions
title_full Recovery of the first and second phases of the M wave after prolonged maximal voluntary contractions
title_fullStr Recovery of the first and second phases of the M wave after prolonged maximal voluntary contractions
title_full_unstemmed Recovery of the first and second phases of the M wave after prolonged maximal voluntary contractions
title_sort Recovery of the first and second phases of the M wave after prolonged maximal voluntary contractions
dc.creator.none.fl_str_mv Rodríguez Falces, Javier
Malanda Trigueros, Armando
Lavilla Oiz, Ana
Navallas Irujo, Javier
author Rodríguez Falces, Javier
author_facet Rodríguez Falces, Javier
Malanda Trigueros, Armando
Lavilla Oiz, Ana
Navallas Irujo, Javier
author_role author
author2 Malanda Trigueros, Armando
Lavilla Oiz, Ana
Navallas Irujo, Javier
author2_role author
author
author
dc.contributor.none.fl_str_mv Ingeniería Eléctrica, Electrónica y de Comunicación
Ingeniaritza Elektrikoa, Elektronikoa eta Telekomunikazio Ingeniaritza
dc.subject.none.fl_str_mv M wave
Recovery
Femoral nerve stimulation
Quadriceps
Fatigue
Membrane excitability
topic M wave
Recovery
Femoral nerve stimulation
Quadriceps
Fatigue
Membrane excitability
description Introduction: 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). Methods: 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. Results: (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 < 0.05). (2) The first phase remained enlarged for 2 min after exercise, whereas the augmentation of the second phase only lasted for 30 s. (3) After 30 min of recovery, the amplitude, area, and duration of both the first and second phases were decreased compared to control values (P < 0.05). Conclusions: The similar enlargement of the M-wave first phase after the 1 and 3-min MVCs suggests that the extracellular K+ concentration attained after these contractions was similar. The mechanisms responsible for the long-term decreases in M-wave amplitude and duration are unknown at present, but are likely due to a decrease in the amplitude of individual transmembrane potentials and an increase in conduction velocity.
publishDate 2019
dc.date.none.fl_str_mv 2019
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2454/55561
url https://hdl.handle.net/2454/55561
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.rights.none.fl_str_mv © 2020 Elsevier Ltd. This manuscript version is made available under the CC-BY-NC-ND 4.0
https://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv © 2020 Elsevier Ltd. This manuscript version is made available under the CC-BY-NC-ND 4.0
https://creativecommons.org/licenses/by-nc-nd/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:Academica-e. Repositorio Institucional de la Universidad Pública de Navarra
instname:Universidad Pública de Navarra
instname_str Universidad Pública de Navarra
reponame_str Academica-e. Repositorio Institucional de la Universidad Pública de Navarra
collection Academica-e. Repositorio Institucional de la Universidad Pública de Navarra
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869417680034856960
score 15,811543

Similares en LA Referencia