Beta alanine supplementation effects on metabolic contribution and swimming performance

Autor(es)

Norberto, Matheus Silva ^{[1, 2]} ; Barbieri, Ricardo Augusto ^{[1, 3]} ; Bertucci, Danilo Rodrigues ^[4] ; Gobbi, Ronaldo Bucken ^[1] ; Campos, Eduardo Zapaterra ^[5] ; Zagatto, Alessandrou Moura ^[6] ; De Freitas, Ellen Cristini ^[1] ; Papoti, Marcelo ^{[1, 2]}

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Sch Phys Educ & Sport Ribeirao Preto EEFERP USP, Ribeirao Preto, SP - Brazil

^[2] Univ Sao Paulo, Med Univ Ribeirao Preto FMRP USP, Ribeirao Preto, SP - Brazil

^[3] Estacio Univ, Ribeirao Preto, SP - Brazil

^[4] State Sao Paulo Univ, Dept Phys Educ, UNESP, Rio Claro, SP - Brazil

^[5] Univ Fed Pernambuco, Dept Phys Educ, UFPE, Recife, PE - Brazil

^[6] State Sao Paulo Univ, Dept Phys Educ, UNESP, Bauru, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF THE INTERNATIONAL SOCIETY OF SPORTS NUTRITION; v. 17, n. 1 JUL 25 2020.
• Citações Web of Science: 0

Resumo

Background Investigations of beta-alanine supplementation shows effects on metabolic (aerobic and anaerobic) participation and performance on swimming by a possible blood acidosis buffering. Considering this background, the objective of the present study was to analyze the effects of beta-alanine supplementation on metabolic contribution and performance during 400-m swim. Methods Thirteen competitive swimmers underwent a 6-week, double-blind placebo-controlled study, ingesting 4.8 g.day(- 1)of beta-alanine or placebo. Before and after the supplementation period, the total anaerobic contribution (TAn) and 30-s all-out tethered swimming effort (30TS) were assessed. Anaerobic alactic (AnAl) and lactic energy (AnLa) was assumed as the fast component of excess post-exercise oxygen consumption and net blood lactate accumulation during exercise ( increment {[}La-]), respectively. Aerobic contribution (Aer) was determined by the difference between total energy demand and TAn. In addition to conventional statistical analysis (Repeated measures ANOVA;p > 0.05), a Bayesian repeated measures ANOVA was used to evidence the effect probability (BFincl). Results No differences and effects were found between groups, indicating no supplementation effects. Repeated measures ANOVA, with confirmation of effect, was indicate reduce in increment Lactate (p: 0.001; BFincl: 25.02); absolute AnLa (p: 0.002; BFincl: 12.61), fatigue index (p > 0.001; BFincl: 63.25) and total anaerobic participation (p: 0.008; BFincl: 4.89). Conclusions Thus, the results demonstrated that all changes presented were evidenced as a result of exposure to the training period and beta-alanine supplementation doesn't affect metabolic contribution and performance during 400-m freestyle. (AU)

• Processo FAPESP: 16/12781-5 - Adaptações metabólicas, hematológicas e neuromusculares provenientes do treinamento "dormir alto e treinar baixo", seguido de um período de polimento: um estudo duplo-cego e randomizado.
• Beneficiário: Marcelo Papoti
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 13/15322-3 - Determinação do máximo déficit acumulado de oxigênio por meio da técnica de retro extrapolação em nadadores, corredores e ciclistas
• Beneficiário: Marcelo Papoti
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 16/11076-6 - Suplementação de ²-alanina associado ao treinamento intervalado de alta intensidade no desempenho e na manifestação dos processos de fadiga central e periférica durante sprints repetidos
• Beneficiário: Alessandro Moura Zagatto
• Modalidade de apoio: Auxílio à Pesquisa - Regular