Beta alanine supplementation effects on metabolic contribution and swimming performance
Nenhuma Miniatura disponível
Data
2020-07-25
Autores
Norberto, Matheus Silva
Barbieri, Ricardo Augusto
Bertucci, Danilo Rodrigues [UNESP]
Gobbi, Ronaldo Bucken
Campos, Eduardo Zapaterra
Zagatto, Alessandrou Moura [UNESP]
De Freitas, Ellen Cristini
Papoti, Marcelo
Título da Revista
ISSN da Revista
Título de Volume
Editor
Resumo
Background: Investigations of β-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 β-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 β-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 (Δ[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 ΔLactate (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 β-alanine supplementation doesn't affect metabolic contribution and performance during 400-m freestyle.
Descrição
Palavras-chave
30-s all-out tethered, Accumulated oxygen deficit, Anaerobic energy release, Beta-alanine, Sports science, Swimming
Como citar
Journal of the International Society of Sports Nutrition, v. 17, n. 1, 2020.