Low-level laser therapy improves the VO2 kinetics in competitive cyclists

Detalhes bibliográficos
Autor(a) principal: Lanferdini, Fábio J.
Data de Publicação: 2017
Outros Autores: Krüger, Renata L., Baroni, Bruno M., Lazzari, Caetano, Figueiredo, Pedro, Reischak-Oliveira, Alvaro, Vaz, Marco A.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10400.24/1819
Resumo: Some evidence supports that low-level laser therapy (LLLT) reduces neuromuscular fatigue, so incrementing sports performance. A previous randomized controlled trial of our group showed increased exercise tolerance in male competitive cyclists treated with three different LLLT doses (3, 6, and 9 J/diode; or 135, 270, and 405 J/thigh) before time-to-exhaustion cycling tests. Now, the present study was designed to evaluate the effects of these LLLT doses on the VO2 kinetics of athletes during cycling tests. Twenty male competitive cyclists (29 years) participated in a crossover, randomized, double-blind, and placebo-controlled trial. On the first day, the participants performed an incremental cycling test to exhaustion to determine maximal oxygen uptake (VO2MAX) and maximal power output (POMAX), as well as a familiarization with the time-to-exhaustion test. In the following days (2 to 5), all participants performed time-to-exhaustion tests at POMAX. Before the exhaustion test, different doses of LLLT (3, 6, and 9 J/diode; or 135, 270, and 405 J/thigh, respectively) or placebo were applied bilaterally to the quadriceps muscle. All exhaustion tests were monitored online by an open-circuit spirometry system in order to analyze the VO2 amplitude, VO2 delay time, time constant (tau), and O2 deficit. Tau and O2 deficit were decreased with LLLT applications compared to the placebo condition (p < 0.05). No differences (p > 0.05) were found between the experimental conditions for VO2 amplitude and VO2 delay time. In conclusion, LLLT decreases tau and O2 deficit during time-to-exhaustion tests in competitive cyclists, and these changes in VO2 kinetics response can be one of the possible mechanisms to explain the ergogenic effect induced by LLLT.
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spelling Low-level laser therapy improves the VO2 kinetics in competitive cyclistsAdultCross-Over StudiesDouble-Blind MethodExerciseExercise TestHumansKineticsLow-Level Light TherapyMaleBicyclingOxygen ConsumptionSome evidence supports that low-level laser therapy (LLLT) reduces neuromuscular fatigue, so incrementing sports performance. A previous randomized controlled trial of our group showed increased exercise tolerance in male competitive cyclists treated with three different LLLT doses (3, 6, and 9 J/diode; or 135, 270, and 405 J/thigh) before time-to-exhaustion cycling tests. Now, the present study was designed to evaluate the effects of these LLLT doses on the VO2 kinetics of athletes during cycling tests. Twenty male competitive cyclists (29 years) participated in a crossover, randomized, double-blind, and placebo-controlled trial. On the first day, the participants performed an incremental cycling test to exhaustion to determine maximal oxygen uptake (VO2MAX) and maximal power output (POMAX), as well as a familiarization with the time-to-exhaustion test. In the following days (2 to 5), all participants performed time-to-exhaustion tests at POMAX. Before the exhaustion test, different doses of LLLT (3, 6, and 9 J/diode; or 135, 270, and 405 J/thigh, respectively) or placebo were applied bilaterally to the quadriceps muscle. All exhaustion tests were monitored online by an open-circuit spirometry system in order to analyze the VO2 amplitude, VO2 delay time, time constant (tau), and O2 deficit. Tau and O2 deficit were decreased with LLLT applications compared to the placebo condition (p < 0.05). No differences (p > 0.05) were found between the experimental conditions for VO2 amplitude and VO2 delay time. In conclusion, LLLT decreases tau and O2 deficit during time-to-exhaustion tests in competitive cyclists, and these changes in VO2 kinetics response can be one of the possible mechanisms to explain the ergogenic effect induced by LLLT.Repositório Científico da UMAIALanferdini, Fábio J.Krüger, Renata L.Baroni, Bruno M.Lazzari, CaetanoFigueiredo, PedroReischak-Oliveira, AlvaroVaz, Marco A.2021-04-29T14:16:16Z2017-01-01T00:00:00Z2017-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.24/1819eng10.1007/s10103-017-2347-ymetadata only accessinfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2022-09-26T16:01:18Zoai:repositorio.umaia.pt:10400.24/1819Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T16:10:10.650304Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Low-level laser therapy improves the VO2 kinetics in competitive cyclists
title Low-level laser therapy improves the VO2 kinetics in competitive cyclists
spellingShingle Low-level laser therapy improves the VO2 kinetics in competitive cyclists
Lanferdini, Fábio J.
Adult
Cross-Over Studies
Double-Blind Method
Exercise
Exercise Test
Humans
Kinetics
Low-Level Light Therapy
Male
Bicycling
Oxygen Consumption
title_short Low-level laser therapy improves the VO2 kinetics in competitive cyclists
title_full Low-level laser therapy improves the VO2 kinetics in competitive cyclists
title_fullStr Low-level laser therapy improves the VO2 kinetics in competitive cyclists
title_full_unstemmed Low-level laser therapy improves the VO2 kinetics in competitive cyclists
title_sort Low-level laser therapy improves the VO2 kinetics in competitive cyclists
author Lanferdini, Fábio J.
author_facet Lanferdini, Fábio J.
Krüger, Renata L.
Baroni, Bruno M.
Lazzari, Caetano
Figueiredo, Pedro
Reischak-Oliveira, Alvaro
Vaz, Marco A.
author_role author
author2 Krüger, Renata L.
Baroni, Bruno M.
Lazzari, Caetano
Figueiredo, Pedro
Reischak-Oliveira, Alvaro
Vaz, Marco A.
author2_role author
author
author
author
author
author
dc.contributor.none.fl_str_mv Repositório Científico da UMAIA
dc.contributor.author.fl_str_mv Lanferdini, Fábio J.
Krüger, Renata L.
Baroni, Bruno M.
Lazzari, Caetano
Figueiredo, Pedro
Reischak-Oliveira, Alvaro
Vaz, Marco A.
dc.subject.por.fl_str_mv Adult
Cross-Over Studies
Double-Blind Method
Exercise
Exercise Test
Humans
Kinetics
Low-Level Light Therapy
Male
Bicycling
Oxygen Consumption
topic Adult
Cross-Over Studies
Double-Blind Method
Exercise
Exercise Test
Humans
Kinetics
Low-Level Light Therapy
Male
Bicycling
Oxygen Consumption
description Some evidence supports that low-level laser therapy (LLLT) reduces neuromuscular fatigue, so incrementing sports performance. A previous randomized controlled trial of our group showed increased exercise tolerance in male competitive cyclists treated with three different LLLT doses (3, 6, and 9 J/diode; or 135, 270, and 405 J/thigh) before time-to-exhaustion cycling tests. Now, the present study was designed to evaluate the effects of these LLLT doses on the VO2 kinetics of athletes during cycling tests. Twenty male competitive cyclists (29 years) participated in a crossover, randomized, double-blind, and placebo-controlled trial. On the first day, the participants performed an incremental cycling test to exhaustion to determine maximal oxygen uptake (VO2MAX) and maximal power output (POMAX), as well as a familiarization with the time-to-exhaustion test. In the following days (2 to 5), all participants performed time-to-exhaustion tests at POMAX. Before the exhaustion test, different doses of LLLT (3, 6, and 9 J/diode; or 135, 270, and 405 J/thigh, respectively) or placebo were applied bilaterally to the quadriceps muscle. All exhaustion tests were monitored online by an open-circuit spirometry system in order to analyze the VO2 amplitude, VO2 delay time, time constant (tau), and O2 deficit. Tau and O2 deficit were decreased with LLLT applications compared to the placebo condition (p < 0.05). No differences (p > 0.05) were found between the experimental conditions for VO2 amplitude and VO2 delay time. In conclusion, LLLT decreases tau and O2 deficit during time-to-exhaustion tests in competitive cyclists, and these changes in VO2 kinetics response can be one of the possible mechanisms to explain the ergogenic effect induced by LLLT.
publishDate 2017
dc.date.none.fl_str_mv 2017-01-01T00:00:00Z
2017-01-01T00:00:00Z
2021-04-29T14:16:16Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
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dc.identifier.uri.fl_str_mv http://hdl.handle.net/10400.24/1819
url http://hdl.handle.net/10400.24/1819
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1007/s10103-017-2347-y
dc.rights.driver.fl_str_mv metadata only access
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eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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