Efeito da suplementação de beta-alanina no desempenho: uma revisão crítica
Resumo
A beta-alanina é um aminoácido não proteogênico precursor limitante da síntese da carnosina. O aumento da carnosina muscular tem sido considerado um fator de reforço das capacidades físicas e diminuição da fadiga neuromuscular. Nesse contexto, a utilização de beta-alanina como um auxiliar ergogênico tem sido frequentemente descrita. Deste modo, a presente revisão teve como objetivo analisar as principais investigações relacionadas diretamente com os efeitos da suplementação de beta-alanina sobre o desempenho esportivo, bem como estabelecer pautas adequadas para elucidar a posologia da suplementação que promova resultados positivos minimizando as possíveis adversidades. A revisão de literatura englobou publicações nacionais e internacionais, com datas compreendidas entre janeiro de 1990 e maio de 2017, nas bases de dados eletrônicas: Elsevier, Medline, Pubmed, Scopus, Sportdiscus e Web of Science. As palavras chaves utilizadas na busca estavam incluídas na Thesaurus Medical Subject Headings (MeSH) desenvolvido pela U.S. National Library of Medicine. Grande parte dos estudos suporta que a suplementação de, em média, 6,4g/dia de beta-alanina pode melhorar o desempenho em exercícios de alta intensidade e curta duração.
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