The effects of altering the concentric/eccentric phase times on EMG response, lactate accumulation and work completed when training to failure

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dc.creatorGustavo Ferreira Pedrosa
dc.creatorSandra Carvalho Machado
dc.creatorRodrigo Cesar Ribeiro Diniz
dc.creatorLucas Túlio
dc.creatorHugo César Martins Costa
dc.creatorAndre Gustavo Pereira Andrade
dc.creatorMichael Bemben
dc.creatorMauro Heleno Chagas
dc.creatorFernando Vitor Lima
dc.date.accessioned2023-07-19T19:21:13Z
dc.date.accessioned2025-09-08T23:43:49Z
dc.date.available2023-07-19T19:21:13Z
dc.date.issued2020-07-20
dc.description.sponsorshipCNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológico
dc.description.sponsorshipFAPEMIG - Fundação de Amparo à Pesquisa do Estado de Minas Gerais
dc.description.sponsorshipCAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
dc.format.mimetypepdf
dc.identifier.doihttps://doi.org/10.2478/hukin-2019-0132
dc.identifier.issn1640-5544
dc.identifier.urihttps://hdl.handle.net/1843/56759
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.relation.ispartofJournal of Human Kinetics
dc.rightsAcesso Aberto
dc.subjectFisiologia
dc.subjectTreinamento de Força
dc.subjectFadiga
dc.subject.otherPhysiology
dc.subject.otherStrength
dc.subject.otherElectromygraphy
dc.subject.otherBench press
dc.subject.otherCentral fatigue
dc.titleThe effects of altering the concentric/eccentric phase times on EMG response, lactate accumulation and work completed when training to failure
dc.typeArtigo de periódico
local.citation.epage44
local.citation.issue3
local.citation.spage33
local.citation.volume73
local.description.resumoThis study compared the electromyographic response, the blood lactate concentration (BLC), and the maximum number of repetitions (MNR) between protocols of different concentric/eccentric duration taken to muscle failure. This comparison may help to understand how different concentric/eccentric duration may influence performance and the central and metabolic responses in trained men. Seventeen strength-trained men performed two protocols in a counterbalanced design. Three sets of the Smith bench press exercise were performed to failure at 60% of the one repetition maximum (1RM) using each protocol (4-s concentric/2-s eccentric [4 s: 2 s]; and 2-s concentric/4-s eccentric [2 s: 4 s]). The normalized root mean square (EMGRMS) and the mean frequency (EMGMF) of the electromyographic signals for the pectoralis major and the triceps brachii were compared in the first, middle, and last repetitions. The BLC was assessed at rest, during and after the test sessions. To compare the EMG and BLC, a 3-way ANOVA with repeated measures with a post hoc Tukey’s test was used. To compare the MNR performed across the sets, an ANOVA-type rank test with the Dunn’s post hoc test was used. The ANOVA indicated a greater EMGRMS for Protocol 4 s: 2 s in the pectoralis major and a lower EMGMF for Protocol 4 s: 2 s in the triceps brachii at the middle and last repetitions. Both protocols increased the EMGRMS and decreased the EMGMF across repetitions. Despite the results show different levels of activation and neuromuscular fatigue between protocols, the BLC and the MNR were similar.
local.identifier.orcidhttps://orcid.org/0000-0002-1955-8990
local.publisher.countryBrasil
local.publisher.departmentEEF - DEPARTAMENTO DE ESPORTES
local.publisher.departmentEEFFTO - ESCOLA DE EDUCAÇÃO FISICA, FISIOTERAPIA E TERAPIA OCUPACIONAL
local.publisher.initialsUFMG
local.url.externahttps://sciendo.com/article/10.2478/hukin-2019-0132

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