Author(s): 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
Date: 2018
Persistent ID: http://hdl.handle.net/11449/159540
Origin: Oasisbr
Subject(s): Carnosine; Buffers; Athletes; Dietary supplement
Made available in DSpace on 2018-11-26T15:44:12Z (GMT). No. of bitstreams: 0 Previous issue date: 2017-04-01
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
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.
Univ Sao Paulo, Sch Phys Educ & Sport, Lab Appl Nutr & Metab, Sao Paulo, Brazil
Univ Sao Paulo, Sch Phys Educ & Sport, Combat Sports & Martial Arts Res Grp, Sao Paulo, Brazil
Univ Estadual Paulista, Fac Sci, Lab Physiol & Sport Performance LAFIDE, Sao Paulo, Brazil
Univ Estadual Paulista, Fac Sci, Lab Physiol & Sport Performance LAFIDE, Sao Paulo, Brazil
FAPESP: 2013/04806-0
FAPESP: 2013/14746-4
FAPESP: 2014/11948-8
