Muscle fibre conduction velocity varies in opposite directions after short- vs. long-duration muscle contractions

Introduction The effects of muscle contractions on muscle fibre conduction velocity have normally been investigated for contractions of a given duration and intensity, with most studies being focused on the decline on conduction velocity during/ after prolonged contractions. Herein, we perform a sys...

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Autores: Rodríguez Falces, Javier, Place, Nicolas
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2021
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:2454/55559
Acceso en línea:https://hdl.handle.net/2454/55559
Access Level:acceso abierto
Palabra clave:M-wave
Femoral nerve stimulation
Conduction velocity
Muscle fibre diameter
Muscle shortening
Brief contractions
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spelling Muscle fibre conduction velocity varies in opposite directions after short- vs. long-duration muscle contractionsRodríguez Falces, JavierPlace, NicolasM-waveFemoral nerve stimulationConduction velocityMuscle fibre diameterMuscle shorteningBrief contractionsIntroduction The effects of muscle contractions on muscle fibre conduction velocity have normally been investigated for contractions of a given duration and intensity, with most studies being focused on the decline on conduction velocity during/ after prolonged contractions. Herein, we perform a systematic analysis of the changes in conduction velocity after voluntary contractions of different durations and intensities. Methods Conduction velocity was estimated in the vastus lateralis before and after knee extensor isometric maximal voluntary contractions (MVCs) of 1, 3, 6, 10, 30 and 60 s, and after brief (3 s) contractions at 10, 30, 50, 70, and 90% of MVC force. Measurements were made during the 10-min period following each contraction. Results (1) Conduction velocity was increased immediately after (1 s) the MVCs of brief (≤ 10 s) duration (12 ± 2%, P < 0.05), and then returned rapidly (within 15 s) to control levels; (2) the extent of the increase in conduction velocity was similar after the 3-s, 6-s, and 10-s MVCs (P > 0.05); (3) the magnitude of the increase in conduction velocity after a brief contraction augmented with the intensity of the contraction (increases of 4.6, 7.7, 11.4, 14.8, and 15.2% for contractions at 10, 30, 50, 70, and 90% of MVC force, respectively); (4) conduction velocity was not decreased immediately after the 30-s MVC (P > 0.05); and (5) conduction velocity did not reach its minimum 1 s after the long (≥ 30 s) MVCs. Conclusions Brief (≤ 10 s) muscle contractions induce a short-term increase in conduction velocity, lasting 15 s, while long (≥ 30 s) contractions produce a long-term decrease in conduction velocity, lasting more than 2 min.SpringerIngeniería Eléctrica, Electrónica y de ComunicaciónIngeniaritza Elektrikoa, Elektronikoa eta Telekomunikazio Ingeniaritza2021info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersionapplication/pdfapplication/mswordhttps://hdl.handle.net/2454/55559reponame:Academica-e. Repositorio Institucional de la Universidad Pública de Navarrainstname:Universidad Pública de NavarraInglés© 2021, The Author(s), under exclusive licence to Springer-Verlag GmbH, DE part of Springer Nature.info:eu-repo/semantics/openAccessoai:academica-e.unavarra.es:2454/555592026-06-17T12:41:47Z
dc.title.none.fl_str_mv Muscle fibre conduction velocity varies in opposite directions after short- vs. long-duration muscle contractions
title Muscle fibre conduction velocity varies in opposite directions after short- vs. long-duration muscle contractions
spellingShingle Muscle fibre conduction velocity varies in opposite directions after short- vs. long-duration muscle contractions
Rodríguez Falces, Javier
M-wave
Femoral nerve stimulation
Conduction velocity
Muscle fibre diameter
Muscle shortening
Brief contractions
title_short Muscle fibre conduction velocity varies in opposite directions after short- vs. long-duration muscle contractions
title_full Muscle fibre conduction velocity varies in opposite directions after short- vs. long-duration muscle contractions
title_fullStr Muscle fibre conduction velocity varies in opposite directions after short- vs. long-duration muscle contractions
title_full_unstemmed Muscle fibre conduction velocity varies in opposite directions after short- vs. long-duration muscle contractions
title_sort Muscle fibre conduction velocity varies in opposite directions after short- vs. long-duration muscle contractions
dc.creator.none.fl_str_mv Rodríguez Falces, Javier
Place, Nicolas
author Rodríguez Falces, Javier
author_facet Rodríguez Falces, Javier
Place, Nicolas
author_role author
author2 Place, Nicolas
author2_role 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
Femoral nerve stimulation
Conduction velocity
Muscle fibre diameter
Muscle shortening
Brief contractions
topic M-wave
Femoral nerve stimulation
Conduction velocity
Muscle fibre diameter
Muscle shortening
Brief contractions
description Introduction The effects of muscle contractions on muscle fibre conduction velocity have normally been investigated for contractions of a given duration and intensity, with most studies being focused on the decline on conduction velocity during/ after prolonged contractions. Herein, we perform a systematic analysis of the changes in conduction velocity after voluntary contractions of different durations and intensities. Methods Conduction velocity was estimated in the vastus lateralis before and after knee extensor isometric maximal voluntary contractions (MVCs) of 1, 3, 6, 10, 30 and 60 s, and after brief (3 s) contractions at 10, 30, 50, 70, and 90% of MVC force. Measurements were made during the 10-min period following each contraction. Results (1) Conduction velocity was increased immediately after (1 s) the MVCs of brief (≤ 10 s) duration (12 ± 2%, P < 0.05), and then returned rapidly (within 15 s) to control levels; (2) the extent of the increase in conduction velocity was similar after the 3-s, 6-s, and 10-s MVCs (P > 0.05); (3) the magnitude of the increase in conduction velocity after a brief contraction augmented with the intensity of the contraction (increases of 4.6, 7.7, 11.4, 14.8, and 15.2% for contractions at 10, 30, 50, 70, and 90% of MVC force, respectively); (4) conduction velocity was not decreased immediately after the 30-s MVC (P > 0.05); and (5) conduction velocity did not reach its minimum 1 s after the long (≥ 30 s) MVCs. Conclusions Brief (≤ 10 s) muscle contractions induce a short-term increase in conduction velocity, lasting 15 s, while long (≥ 30 s) contractions produce a long-term decrease in conduction velocity, lasting more than 2 min.
publishDate 2021
dc.date.none.fl_str_mv 2021
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/2454/55559
url https://hdl.handle.net/2454/55559
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.rights.none.fl_str_mv © 2021, The Author(s), under exclusive licence to Springer-Verlag GmbH, DE part of Springer Nature.
info:eu-repo/semantics/openAccess
rights_invalid_str_mv © 2021, The Author(s), under exclusive licence to Springer-Verlag GmbH, DE part of Springer Nature.
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/msword
dc.publisher.none.fl_str_mv Springer
publisher.none.fl_str_mv Springer
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
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