Beta-alanine supplementation enhances judo-related performance in highly-trained athletes
Autor(a) principal: | |
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Data de Publicação: | 2017 |
Outros Autores: | , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.jsams.2016.08.014 http://hdl.handle.net/11449/159540 |
Resumo: | Objectives: In official judo competitions, athletes usually engage in 5-7 matches in the same day, performing numerous high-intensity efforts interspersed by short recovery intervals. Thus, glycolytic demand in judo is high and acidosis may limit performance. Carnosine is a relevant intracellular acid buffer whose content is increased with beta-alanine supplementation. Thus, we hypothesized that beta-alanine supplementation could attenuate acidosis and improve judo performance. Design: Twenty-three highly-trained judo athletes were randomly assigned to receive either beta-alanine -(6.4 g day(-1)) or placebo (dextrose, same dosage) for 4 weeks. Methods: Performance was assessed before (PRE) and after (POST) supplementation through a 5-min simulated fight (randori) followed by 3 bouts of the Special Judo Fitness Test (SJFT). Blood samples were collected for blood pH, bicarbonate (HCO3-) and lactate determination. Results: Beta-alanine supplementation improved the number of throws per set and the total number of throws (both p < 0.05). Placebo did not change these variables (both p > 0.05). Blood pH and HCO(3)(-)reduced after exercise (all p < 0.001), with no between-group differences (all p > 0.05). However, the lactate response to exercise increased in the beta-alanine group as compared to placebo (p < 0.05). Conclusions: In conclusion, 4 weeks of beta-alanine supplementation effectively enhance judo-related performance in highly-trained athletes. (C) 2016 Sports Medicine Australia. Published by Elsevier Ltd. All rights reserved. |
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Repositório Institucional da UNESP |
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Beta-alanine supplementation enhances judo-related performance in highly-trained athletesCarnosineBuffersAthletesDietary supplementObjectives: In official judo competitions, athletes usually engage in 5-7 matches in the same day, performing numerous high-intensity efforts interspersed by short recovery intervals. Thus, glycolytic demand in judo is high and acidosis may limit performance. Carnosine is a relevant intracellular acid buffer whose content is increased with beta-alanine supplementation. Thus, we hypothesized that beta-alanine supplementation could attenuate acidosis and improve judo performance. Design: Twenty-three highly-trained judo athletes were randomly assigned to receive either beta-alanine -(6.4 g day(-1)) or placebo (dextrose, same dosage) for 4 weeks. Methods: Performance was assessed before (PRE) and after (POST) supplementation through a 5-min simulated fight (randori) followed by 3 bouts of the Special Judo Fitness Test (SJFT). Blood samples were collected for blood pH, bicarbonate (HCO3-) and lactate determination. Results: Beta-alanine supplementation improved the number of throws per set and the total number of throws (both p < 0.05). Placebo did not change these variables (both p > 0.05). Blood pH and HCO(3)(-)reduced after exercise (all p < 0.001), with no between-group differences (all p > 0.05). However, the lactate response to exercise increased in the beta-alanine group as compared to placebo (p < 0.05). Conclusions: In conclusion, 4 weeks of beta-alanine supplementation effectively enhance judo-related performance in highly-trained athletes. (C) 2016 Sports Medicine Australia. Published by Elsevier Ltd. All rights reserved.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Univ Sao Paulo, Sch Phys Educ & Sport, Lab Appl Nutr & Metab, Sao Paulo, BrazilUniv Sao Paulo, Sch Phys Educ & Sport, Combat Sports & Martial Arts Res Grp, Sao Paulo, BrazilUniv Estadual Paulista, Fac Sci, Lab Physiol & Sport Performance LAFIDE, Sao Paulo, BrazilUniv Estadual Paulista, Fac Sci, Lab Physiol & Sport Performance LAFIDE, Sao Paulo, BrazilFAPESP: 2013/04806-0FAPESP: 2013/14746-4FAPESP: 2014/11948-8Elsevier B.V.Universidade de São Paulo (USP)Universidade Estadual Paulista (Unesp)Kratz, Caroline de AndradePainelli, Vitor de SallesAndrade Nemezio, Kleiner Marcio deSilva, Rafael Pires daFranchini, EmersonZagatto, Alessandro Moura [UNESP]Gualano, BrunoArtioli, Guilherme Giannini2018-11-26T15:44:12Z2018-11-26T15:44:12Z2017-04-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article403-408application/pdfhttp://dx.doi.org/10.1016/j.jsams.2016.08.014Journal Of Science And Medicine In Sport. Oxford: Elsevier Sci Ltd, v. 20, n. 4, p. 403-408, 2017.1440-2440http://hdl.handle.net/11449/15954010.1016/j.jsams.2016.08.014WOS:000401051500017WOS000401051500017.pdfWeb of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal Of Science And Medicine In Sport1,714info:eu-repo/semantics/openAccess2023-10-11T06:04:05Zoai:repositorio.unesp.br:11449/159540Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462023-10-11T06:04:05Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Beta-alanine supplementation enhances judo-related performance in highly-trained athletes |
title |
Beta-alanine supplementation enhances judo-related performance in highly-trained athletes |
spellingShingle |
Beta-alanine supplementation enhances judo-related performance in highly-trained athletes Kratz, Caroline de Andrade Carnosine Buffers Athletes Dietary supplement |
title_short |
Beta-alanine supplementation enhances judo-related performance in highly-trained athletes |
title_full |
Beta-alanine supplementation enhances judo-related performance in highly-trained athletes |
title_fullStr |
Beta-alanine supplementation enhances judo-related performance in highly-trained athletes |
title_full_unstemmed |
Beta-alanine supplementation enhances judo-related performance in highly-trained athletes |
title_sort |
Beta-alanine supplementation enhances judo-related performance in highly-trained athletes |
author |
Kratz, Caroline de Andrade |
author_facet |
Kratz, Caroline de Andrade Painelli, Vitor de Salles Andrade Nemezio, Kleiner Marcio de Silva, Rafael Pires da Franchini, Emerson Zagatto, Alessandro Moura [UNESP] Gualano, Bruno Artioli, Guilherme Giannini |
author_role |
author |
author2 |
Painelli, Vitor de Salles Andrade Nemezio, Kleiner Marcio de Silva, Rafael Pires da Franchini, Emerson Zagatto, Alessandro Moura [UNESP] Gualano, Bruno Artioli, Guilherme Giannini |
author2_role |
author author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade de São Paulo (USP) Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Kratz, Caroline de Andrade Painelli, Vitor de Salles Andrade Nemezio, Kleiner Marcio de Silva, Rafael Pires da Franchini, Emerson Zagatto, Alessandro Moura [UNESP] Gualano, Bruno Artioli, Guilherme Giannini |
dc.subject.por.fl_str_mv |
Carnosine Buffers Athletes Dietary supplement |
topic |
Carnosine Buffers Athletes Dietary supplement |
description |
Objectives: In official judo competitions, athletes usually engage in 5-7 matches in the same day, performing numerous high-intensity efforts interspersed by short recovery intervals. Thus, glycolytic demand in judo is high and acidosis may limit performance. Carnosine is a relevant intracellular acid buffer whose content is increased with beta-alanine supplementation. Thus, we hypothesized that beta-alanine supplementation could attenuate acidosis and improve judo performance. Design: Twenty-three highly-trained judo athletes were randomly assigned to receive either beta-alanine -(6.4 g day(-1)) or placebo (dextrose, same dosage) for 4 weeks. Methods: Performance was assessed before (PRE) and after (POST) supplementation through a 5-min simulated fight (randori) followed by 3 bouts of the Special Judo Fitness Test (SJFT). Blood samples were collected for blood pH, bicarbonate (HCO3-) and lactate determination. Results: Beta-alanine supplementation improved the number of throws per set and the total number of throws (both p < 0.05). Placebo did not change these variables (both p > 0.05). Blood pH and HCO(3)(-)reduced after exercise (all p < 0.001), with no between-group differences (all p > 0.05). However, the lactate response to exercise increased in the beta-alanine group as compared to placebo (p < 0.05). Conclusions: In conclusion, 4 weeks of beta-alanine supplementation effectively enhance judo-related performance in highly-trained athletes. (C) 2016 Sports Medicine Australia. Published by Elsevier Ltd. All rights reserved. |
publishDate |
2017 |
dc.date.none.fl_str_mv |
2017-04-01 2018-11-26T15:44:12Z 2018-11-26T15:44:12Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1016/j.jsams.2016.08.014 Journal Of Science And Medicine In Sport. Oxford: Elsevier Sci Ltd, v. 20, n. 4, p. 403-408, 2017. 1440-2440 http://hdl.handle.net/11449/159540 10.1016/j.jsams.2016.08.014 WOS:000401051500017 WOS000401051500017.pdf |
url |
http://dx.doi.org/10.1016/j.jsams.2016.08.014 http://hdl.handle.net/11449/159540 |
identifier_str_mv |
Journal Of Science And Medicine In Sport. Oxford: Elsevier Sci Ltd, v. 20, n. 4, p. 403-408, 2017. 1440-2440 10.1016/j.jsams.2016.08.014 WOS:000401051500017 WOS000401051500017.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Journal Of Science And Medicine In Sport 1,714 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
403-408 application/pdf |
dc.publisher.none.fl_str_mv |
Elsevier B.V. |
publisher.none.fl_str_mv |
Elsevier B.V. |
dc.source.none.fl_str_mv |
Web of Science reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
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1792961518627717120 |