Cargando…
Evaluation of Central and Peripheral Fatigue in the Quadriceps Using Fractal Dimension and Conduction Velocity in Young Females
PURPOSE: Over the past decade, linear and non-linear surface electromyography descriptors for central and peripheral components of fatigue have been developed. In the current study, we tested fractal dimension (FD) and conduction velocity (CV) as myoelectric descriptors of central and peripheral fat...
Autores principales: | , , , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Public Library of Science
2015
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4400165/ https://www.ncbi.nlm.nih.gov/pubmed/25880369 http://dx.doi.org/10.1371/journal.pone.0123921 |
_version_ | 1782367000978259968 |
---|---|
author | Beretta-Piccoli, Matteo D’Antona, Giuseppe Barbero, Marco Fisher, Beth Dieli-Conwright, Christina M. Clijsen, Ron Cescon, Corrado |
author_facet | Beretta-Piccoli, Matteo D’Antona, Giuseppe Barbero, Marco Fisher, Beth Dieli-Conwright, Christina M. Clijsen, Ron Cescon, Corrado |
author_sort | Beretta-Piccoli, Matteo |
collection | PubMed |
description | PURPOSE: Over the past decade, linear and non-linear surface electromyography descriptors for central and peripheral components of fatigue have been developed. In the current study, we tested fractal dimension (FD) and conduction velocity (CV) as myoelectric descriptors of central and peripheral fatigue, respectively. To this aim, we analyzed FD and CV slopes during sustained fatiguing contractions of the quadriceps femoris in healthy humans. METHODS: A total of 29 recreationally active women (mean age±standard deviation: 24±4 years) and two female elite athletes (one power athlete, age 24 and one endurance athlete, age 30 years) performed two knee extensions: (1) at 20% maximal voluntary contraction (MVC) for 30 s, and (2) at 60% MVC held until exhaustion. Surface EMG signals were detected from the vastus lateralis and vastus medialis using bidimensional arrays. RESULTS: Central and peripheral fatigue were described as decreases in FD and CV, respectively. A positive correlation between FD and CV (R=0.51, p<0.01) was found during the sustained 60% MVC, probably as a result of simultaneous motor unit synchronization and a decrease in muscle fiber CV during the fatiguing task. CONCLUSIONS: Central and peripheral fatigue can be described as changes in FD and CV, at least in young, healthy women. The significant correlation between FD and CV observed at 60% MVC suggests that a mutual interaction between central and peripheral fatigue can arise during submaximal isometric contractions. |
format | Online Article Text |
id | pubmed-4400165 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2015 |
publisher | Public Library of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-44001652015-04-21 Evaluation of Central and Peripheral Fatigue in the Quadriceps Using Fractal Dimension and Conduction Velocity in Young Females Beretta-Piccoli, Matteo D’Antona, Giuseppe Barbero, Marco Fisher, Beth Dieli-Conwright, Christina M. Clijsen, Ron Cescon, Corrado PLoS One Research Article PURPOSE: Over the past decade, linear and non-linear surface electromyography descriptors for central and peripheral components of fatigue have been developed. In the current study, we tested fractal dimension (FD) and conduction velocity (CV) as myoelectric descriptors of central and peripheral fatigue, respectively. To this aim, we analyzed FD and CV slopes during sustained fatiguing contractions of the quadriceps femoris in healthy humans. METHODS: A total of 29 recreationally active women (mean age±standard deviation: 24±4 years) and two female elite athletes (one power athlete, age 24 and one endurance athlete, age 30 years) performed two knee extensions: (1) at 20% maximal voluntary contraction (MVC) for 30 s, and (2) at 60% MVC held until exhaustion. Surface EMG signals were detected from the vastus lateralis and vastus medialis using bidimensional arrays. RESULTS: Central and peripheral fatigue were described as decreases in FD and CV, respectively. A positive correlation between FD and CV (R=0.51, p<0.01) was found during the sustained 60% MVC, probably as a result of simultaneous motor unit synchronization and a decrease in muscle fiber CV during the fatiguing task. CONCLUSIONS: Central and peripheral fatigue can be described as changes in FD and CV, at least in young, healthy women. The significant correlation between FD and CV observed at 60% MVC suggests that a mutual interaction between central and peripheral fatigue can arise during submaximal isometric contractions. Public Library of Science 2015-04-16 /pmc/articles/PMC4400165/ /pubmed/25880369 http://dx.doi.org/10.1371/journal.pone.0123921 Text en © 2015 Beretta-Piccoli et al http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited. |
spellingShingle | Research Article Beretta-Piccoli, Matteo D’Antona, Giuseppe Barbero, Marco Fisher, Beth Dieli-Conwright, Christina M. Clijsen, Ron Cescon, Corrado Evaluation of Central and Peripheral Fatigue in the Quadriceps Using Fractal Dimension and Conduction Velocity in Young Females |
title | Evaluation of Central and Peripheral Fatigue in the Quadriceps Using Fractal Dimension and Conduction Velocity in Young Females |
title_full | Evaluation of Central and Peripheral Fatigue in the Quadriceps Using Fractal Dimension and Conduction Velocity in Young Females |
title_fullStr | Evaluation of Central and Peripheral Fatigue in the Quadriceps Using Fractal Dimension and Conduction Velocity in Young Females |
title_full_unstemmed | Evaluation of Central and Peripheral Fatigue in the Quadriceps Using Fractal Dimension and Conduction Velocity in Young Females |
title_short | Evaluation of Central and Peripheral Fatigue in the Quadriceps Using Fractal Dimension and Conduction Velocity in Young Females |
title_sort | evaluation of central and peripheral fatigue in the quadriceps using fractal dimension and conduction velocity in young females |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4400165/ https://www.ncbi.nlm.nih.gov/pubmed/25880369 http://dx.doi.org/10.1371/journal.pone.0123921 |
work_keys_str_mv | AT berettapiccolimatteo evaluationofcentralandperipheralfatigueinthequadricepsusingfractaldimensionandconductionvelocityinyoungfemales AT dantonagiuseppe evaluationofcentralandperipheralfatigueinthequadricepsusingfractaldimensionandconductionvelocityinyoungfemales AT barberomarco evaluationofcentralandperipheralfatigueinthequadricepsusingfractaldimensionandconductionvelocityinyoungfemales AT fisherbeth evaluationofcentralandperipheralfatigueinthequadricepsusingfractaldimensionandconductionvelocityinyoungfemales AT dieliconwrightchristinam evaluationofcentralandperipheralfatigueinthequadricepsusingfractaldimensionandconductionvelocityinyoungfemales AT clijsenron evaluationofcentralandperipheralfatigueinthequadricepsusingfractaldimensionandconductionvelocityinyoungfemales AT cesconcorrado evaluationofcentralandperipheralfatigueinthequadricepsusingfractaldimensionandconductionvelocityinyoungfemales |