Abstract
Abstract
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 (∆[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 ∆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 β-alanine supplementation doesn’t affect metabolic contribution and performance during 400-m freestyle.
Funder
Fundação de Amparo à Pesquisa do Estado de São Paulo
Subject
Nutrition and Dietetics,Food Science
Reference36 articles.
1. Campos EZ, Kalva-Filho CA, Gobbi RB, Barbieri RA, Almeida NP. Anaerobic contribution determined in swimming distances: relation with performance. Front Physiol. 2017;8:755.
2. Kalva Filho CA, Zagatto AM, Castanho Araújo MI, Pereira Santiago PR. Ramos da Silva AS, Gobatto CA, et al. relationship between aerobic and anaerobic parameters from 3-min all-out tethered swimming and 400-m maximal front crawl effort. J Strength Cond Res. 2014;29(May 2016):238–45.
3. Hobson RM, Saunders B, Ball G, Harris RC, Sale C. Effects of β-alanine supplementation on exercise performance: a meta-analysis. Amino Acids. 2012;43(1):25–37.
4. Chung W, Shaw G, Anderson ME, Pyne DB, Saunders PU, Bishop DJ, et al. Effect of 10 week beta-alanine supplementation on competition and training performance in elite swimmers. Nutrients. 2012;4(10):1441–53.
5. de Andrade Kratz C, De Salles Painelli V, de Andrade Nemezio KM, Da Silva RP, Franchini E, Zagatto AM, et al. Beta-alanine supplementation enhances judo-related performance in highly-trained athletes. J Sci Med Sport. 2016; in press:10–5.
Cited by
6 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献