Efeitos da fadiga sobre a economia de pedalada e ativação muscular em ciclistas treinados durante teste e reteste de exaustão
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Manancial - Repositório Digital da UFSM |
Texto Completo: | http://repositorio.ufsm.br/handle/1/22742 |
Resumo: | Fatigue is an inevitable process during intense and/or extensive exercises, which reduces the performance and efficiency of athletes in most sports, such as cycling. In addition, as the mechanisms of fatigue become more active, changes in the pattern of muscle activation may occur, especially in the muscles that have primary action to perform the movement, in this case the cycling. However, these reductions and alterations are not yet well understood, so that studying them over time in activity can help in understanding the mechanisms of fatigue that lead to exercise intolerance. From this, the objective of the present work was to verify the effect of fatigue on pedaling economy and muscle activation in trained cyclists during exhaustion test and retest. Sixteen competitive male cyclists were evaluated (age 23 ±7 years, body mass: 67 ±7 kg and height: 177 ±6 cm). The athletes had a training experience of ~6.5 years, a usual training volume of ~6 days/week and ~460 km/week. The cyclists made two visits to the laboratory, with the first visit performed an anthropometric evaluation and then an incremental test (heating to 100W for 10 minutes, followed by the addition of 25W every minute until exhaustion) in order to determine the maximum power. In the second visit, the cyclists performed a heating similar to the first visit, then performed the two tests of time until exhaustion at maximum and constant power, with a period of 10 minutes of recovery between tests. During the tests the myoelectric activation of RF, VL and MV was measured, as well as the gas exchange breath by breath. From this, the myoelectric activity was submitted to a frequency band technique, being represented values of total activation, high and low frequency for each muscle. While the gas exchange data were used to calculate the energy demand (PM) and efficiency (GE) of cyclists. The results found indicate reductions in GE and increase of PM in both tests until now intermediate, from which a plateau was established. As for EMG results, reductions in activation of the high frequency bands for the VL muscle were found during the tests, the MV showed reduction only in the second test, remaining stable in the first. While for RF there was an increase in activation throughout the first test and remained stable in the second test. For the low frequency bands, there was an increase in activation for all muscles evaluated during both tests. Finally, the full activation was not changed in both LV and MV, only for RF was there an increase throughout the tests. |
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Efeitos da fadiga sobre a economia de pedalada e ativação muscular em ciclistas treinados durante teste e reteste de exaustãoEffects of fatigue on pedaling economy and muscle activation in trained cyclists during exhaustion test and retestDesempenho atléticoCiclismoFadiga muscularAthletic performanceBicyclingMuscle fatigueCNPQ::CIENCIAS DA SAUDE::EDUCACAO FISICAFatigue is an inevitable process during intense and/or extensive exercises, which reduces the performance and efficiency of athletes in most sports, such as cycling. In addition, as the mechanisms of fatigue become more active, changes in the pattern of muscle activation may occur, especially in the muscles that have primary action to perform the movement, in this case the cycling. However, these reductions and alterations are not yet well understood, so that studying them over time in activity can help in understanding the mechanisms of fatigue that lead to exercise intolerance. From this, the objective of the present work was to verify the effect of fatigue on pedaling economy and muscle activation in trained cyclists during exhaustion test and retest. Sixteen competitive male cyclists were evaluated (age 23 ±7 years, body mass: 67 ±7 kg and height: 177 ±6 cm). The athletes had a training experience of ~6.5 years, a usual training volume of ~6 days/week and ~460 km/week. The cyclists made two visits to the laboratory, with the first visit performed an anthropometric evaluation and then an incremental test (heating to 100W for 10 minutes, followed by the addition of 25W every minute until exhaustion) in order to determine the maximum power. In the second visit, the cyclists performed a heating similar to the first visit, then performed the two tests of time until exhaustion at maximum and constant power, with a period of 10 minutes of recovery between tests. During the tests the myoelectric activation of RF, VL and MV was measured, as well as the gas exchange breath by breath. From this, the myoelectric activity was submitted to a frequency band technique, being represented values of total activation, high and low frequency for each muscle. While the gas exchange data were used to calculate the energy demand (PM) and efficiency (GE) of cyclists. The results found indicate reductions in GE and increase of PM in both tests until now intermediate, from which a plateau was established. As for EMG results, reductions in activation of the high frequency bands for the VL muscle were found during the tests, the MV showed reduction only in the second test, remaining stable in the first. While for RF there was an increase in activation throughout the first test and remained stable in the second test. For the low frequency bands, there was an increase in activation for all muscles evaluated during both tests. Finally, the full activation was not changed in both LV and MV, only for RF was there an increase throughout the tests.Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPESA fadiga é um processo inevitável durante a realização de exercícios intensos e/ou extensos, a qual reduz o desempenho e a eficiência de atletas de grande parte das modalidades esportivas, tal como o ciclismo. Além disso, a medida que os mecanismos de fadiga se tornam mais atuantes, podem ocorrer alterações no padrão de ativação muscular, especialmente nos músculos que apresentam ação primária para realizar o movimento, neste caso a pedalada. Entretanto, essas reduções e alterações ainda não são bem compreendidas, de modo que estudá-las ao longo do tempo em atividade pode auxiliar na compreensão dos mecanismos de fadiga que acarretam na intolerância ao exercício. A partir disso, o objetivo do presente trabalho foi verificar o efeito da fadiga na economia de pedalada e ativação muscular em ciclistas treinados durante teste e reteste de exaustão. Foram avaliados dezesseis ciclistas competitivos do sexo masculino (idade 23 ±7 anos, massa corporal: 67 ±7 kg e estatura: 177 ±6 cm). Os atletas tinham uma experiência de treinamento de ~6,5 anos, um volume de treinamento usual de ~6 dias/semana e ~460 km/semana. Os ciclistas realizaram duas visitas ao laboratório, sendo que na primeira visita foi executada a avaliação antropométrica e, posteriormente, um teste incremental (aquecimento a 100W por 10 minutos, seguido do acrescimento de 25W a cada minuto até a exaustão) com a finalidade de determinar a potência máxima. Na segunda visita, os ciclistas realizaram um aquecimento similar a primeira visita, em seguida desempenharam os dois testes de tempo até a exaustão em potência máxima e constante, com um período de 10 minutos de recuperação entre testes. Durante os testes foi mensurada a ativação mioelétrica do reto femoral (RF), vasto lateral (VL) e vasto medial (VM), e também as trocas gasosas respiração por respiração. A partir disso, a atividade mioelétrica foi submetida a técnica de bandas de frequência, sendo representados valores de ativação total, alta e baixa frequência para cada músculo. Os dados de trocas gasosas foram utilizados para calcular a demanda energética (PM) e eficiência (GE) dos ciclistas. Os resultados encontrados indicam reduções no GE e aumento da PM em ambos os testes até momento intermediários, a partir dos quais se estabeleceu um platô. Quanto aos resultados de EMG, foram constatadas reduções na ativação das bandas de alta frequência para o músculo VL no decorrer dos testes, o VM apresentou redução apenas no segundo teste, mantendo-se estável no primeiro enquanto para o RF houve um aumento na ativação ao longo do primeiro teste e se manteve estável no segundo. Em relação as bandas de baixa frequência, foi verificado aumento na ativação para todos os músculos avaliados no decorrer de ambos os testes. Por fim, a ativação total não foi alterada tanto no VL quanto no VM, apenas para o RF foi registrado aumento ao longo dos testes.Universidade Federal de Santa MariaBrasilEducação FísicaUFSMPrograma de Pós-Graduação em Educação FísicaCentro de Educação Física e DesportosMota, Carlos Bollihttp://lattes.cnpq.br/5319954295407481Cunha, Maria Claudia Pereira Nunes daPranke, Gabriel IvanBarbosa, Igor Martins2021-11-05T19:18:57Z2021-11-05T19:18:57Z2021-01-28info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfhttp://repositorio.ufsm.br/handle/1/22742porAttribution-NonCommercial-NoDerivatives 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessreponame:Manancial - Repositório Digital da UFSMinstname:Universidade Federal de Santa Maria (UFSM)instacron:UFSM2021-12-30T18:28:11Zoai:repositorio.ufsm.br:1/22742Biblioteca Digital de Teses e Dissertaçõeshttps://repositorio.ufsm.br/ONGhttps://repositorio.ufsm.br/oai/requestatendimento.sib@ufsm.br||tedebc@gmail.comopendoar:2021-12-30T18:28:11Manancial - Repositório Digital da UFSM - Universidade Federal de Santa Maria (UFSM)false |
dc.title.none.fl_str_mv |
Efeitos da fadiga sobre a economia de pedalada e ativação muscular em ciclistas treinados durante teste e reteste de exaustão Effects of fatigue on pedaling economy and muscle activation in trained cyclists during exhaustion test and retest |
title |
Efeitos da fadiga sobre a economia de pedalada e ativação muscular em ciclistas treinados durante teste e reteste de exaustão |
spellingShingle |
Efeitos da fadiga sobre a economia de pedalada e ativação muscular em ciclistas treinados durante teste e reteste de exaustão Barbosa, Igor Martins Desempenho atlético Ciclismo Fadiga muscular Athletic performance Bicycling Muscle fatigue CNPQ::CIENCIAS DA SAUDE::EDUCACAO FISICA |
title_short |
Efeitos da fadiga sobre a economia de pedalada e ativação muscular em ciclistas treinados durante teste e reteste de exaustão |
title_full |
Efeitos da fadiga sobre a economia de pedalada e ativação muscular em ciclistas treinados durante teste e reteste de exaustão |
title_fullStr |
Efeitos da fadiga sobre a economia de pedalada e ativação muscular em ciclistas treinados durante teste e reteste de exaustão |
title_full_unstemmed |
Efeitos da fadiga sobre a economia de pedalada e ativação muscular em ciclistas treinados durante teste e reteste de exaustão |
title_sort |
Efeitos da fadiga sobre a economia de pedalada e ativação muscular em ciclistas treinados durante teste e reteste de exaustão |
author |
Barbosa, Igor Martins |
author_facet |
Barbosa, Igor Martins |
author_role |
author |
dc.contributor.none.fl_str_mv |
Mota, Carlos Bolli http://lattes.cnpq.br/5319954295407481 Cunha, Maria Claudia Pereira Nunes da Pranke, Gabriel Ivan |
dc.contributor.author.fl_str_mv |
Barbosa, Igor Martins |
dc.subject.por.fl_str_mv |
Desempenho atlético Ciclismo Fadiga muscular Athletic performance Bicycling Muscle fatigue CNPQ::CIENCIAS DA SAUDE::EDUCACAO FISICA |
topic |
Desempenho atlético Ciclismo Fadiga muscular Athletic performance Bicycling Muscle fatigue CNPQ::CIENCIAS DA SAUDE::EDUCACAO FISICA |
description |
Fatigue is an inevitable process during intense and/or extensive exercises, which reduces the performance and efficiency of athletes in most sports, such as cycling. In addition, as the mechanisms of fatigue become more active, changes in the pattern of muscle activation may occur, especially in the muscles that have primary action to perform the movement, in this case the cycling. However, these reductions and alterations are not yet well understood, so that studying them over time in activity can help in understanding the mechanisms of fatigue that lead to exercise intolerance. From this, the objective of the present work was to verify the effect of fatigue on pedaling economy and muscle activation in trained cyclists during exhaustion test and retest. Sixteen competitive male cyclists were evaluated (age 23 ±7 years, body mass: 67 ±7 kg and height: 177 ±6 cm). The athletes had a training experience of ~6.5 years, a usual training volume of ~6 days/week and ~460 km/week. The cyclists made two visits to the laboratory, with the first visit performed an anthropometric evaluation and then an incremental test (heating to 100W for 10 minutes, followed by the addition of 25W every minute until exhaustion) in order to determine the maximum power. In the second visit, the cyclists performed a heating similar to the first visit, then performed the two tests of time until exhaustion at maximum and constant power, with a period of 10 minutes of recovery between tests. During the tests the myoelectric activation of RF, VL and MV was measured, as well as the gas exchange breath by breath. From this, the myoelectric activity was submitted to a frequency band technique, being represented values of total activation, high and low frequency for each muscle. While the gas exchange data were used to calculate the energy demand (PM) and efficiency (GE) of cyclists. The results found indicate reductions in GE and increase of PM in both tests until now intermediate, from which a plateau was established. As for EMG results, reductions in activation of the high frequency bands for the VL muscle were found during the tests, the MV showed reduction only in the second test, remaining stable in the first. While for RF there was an increase in activation throughout the first test and remained stable in the second test. For the low frequency bands, there was an increase in activation for all muscles evaluated during both tests. Finally, the full activation was not changed in both LV and MV, only for RF was there an increase throughout the tests. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-11-05T19:18:57Z 2021-11-05T19:18:57Z 2021-01-28 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
format |
masterThesis |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://repositorio.ufsm.br/handle/1/22742 |
url |
http://repositorio.ufsm.br/handle/1/22742 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.rights.driver.fl_str_mv |
Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Attribution-NonCommercial-NoDerivatives 4.0 International http://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 |
Universidade Federal de Santa Maria Brasil Educação Física UFSM Programa de Pós-Graduação em Educação Física Centro de Educação Física e Desportos |
publisher.none.fl_str_mv |
Universidade Federal de Santa Maria Brasil Educação Física UFSM Programa de Pós-Graduação em Educação Física Centro de Educação Física e Desportos |
dc.source.none.fl_str_mv |
reponame:Manancial - Repositório Digital da UFSM instname:Universidade Federal de Santa Maria (UFSM) instacron:UFSM |
instname_str |
Universidade Federal de Santa Maria (UFSM) |
instacron_str |
UFSM |
institution |
UFSM |
reponame_str |
Manancial - Repositório Digital da UFSM |
collection |
Manancial - Repositório Digital da UFSM |
repository.name.fl_str_mv |
Manancial - Repositório Digital da UFSM - Universidade Federal de Santa Maria (UFSM) |
repository.mail.fl_str_mv |
atendimento.sib@ufsm.br||tedebc@gmail.com |
_version_ |
1805922105881001984 |