Beta alanine supplementation effects on metabolic contribution and swimming performance

Journal of the International Society of Sports Nutrition

Eduardo Zapaterra Campos¹  Alessandrou Moura Zagatto²  Danilo Rodrigues Bertucci³  Marcelo Papoti⁴  Matheus Silva Norberto⁴  Ellen Cristini De Freitas⁵  Ronaldo Bucken Gobbi⁵  Ricardo Augusto Barbieri⁶ 

[1] Department of Physical Education, Federal University of Pernambuco, (UFPE), Recife, Pernambuco, Brazil;Department of Physical Education, State São Paulo University, (UNESP), Bauru, São Paulo, Brazil;Department of Physical Education, State São Paulo University, (UNESP), Rio Claro, São Paulo, Brazil;University of São Paulo, Medicine University of Ribeirão Preto (FMRP-USP), Ribeirão Preto, São Paulo, Brazil;University of São Paulo, School of Physical Education and sport of Ribeirão Preto (EEFERP-USP), Ribeirão Preto, São Paulo, Brazil;University of São Paulo, School of Physical Education and sport of Ribeirão Preto (EEFERP-USP), Ribeirão Preto, São Paulo, Brazil;University of São Paulo, School of Physical Education and sport of Ribeirão Preto (EEFERP-USP), Ribeirão Preto, São Paulo, Brazil;Estácio University, Ribeirão Preto, São Paulo, Brazil;

关键词: Beta-alanine;    Swimming;    Anaerobic energy release;    30-s all-out tethered;    Accumulated oxygen deficit;    Sports science;   

DOI  :  10.1186/s12970-020-00365-6

来源: Springer

【 摘 要 】

BackgroundInvestigations 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.MethodsThirteen 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 (∆[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).ResultsNo differences and effects were found between groups, indicating no supplementation effects. Repeated measures ANOVA, with confirmation of effect, was indicate reduce in ∆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).ConclusionsThus, 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.

【 授权许可】

CC BY