Aspectos atuais sobre beta alanina, carnosina e exercício físico
DOI:
https://doi.org/10.33233/rbfe.v15i1.37Abstract
A carnosina é um dipeptídeo encontrado em concentrações elevadas no músculo esquelético humano, sintetizado a partir dos aminoácidos Beta alanina e histidina, tendo a beta alanina como precursor. Recentemente, foi demonstrado que níveis elevados de carnosina podem ser benéficos ao desempenho desportivo, através do tamponamento dos íons de hidrogênio, por minimizar a redução do pH intramuscular durante o exercício. Fatores como idade, sexo, tipo de fibra muscular e alimentação também são considerados variáveis determinantes nas concentrações desse composto. Logo, o objetivo desta revisão narrativa foi analisar os principais estudos que relataram sobre os fatores determinantes da concentração de carnosina intramuscular e os potenciais efeitos na performance esportiva através da suplementação de beta alanina. A presente revisão detectou que a suplementação de beta alanina pode ser considerada um recurso eficiente para o aumento no estoque dos níveis de carnosina em diversas populações como indivíduos fisicamente ativos, atletas e idosos, de ambos os sexos, além de melhorar o rendimento em modalidades esportivas e exercícios nas quais predominem alta intensidade.
Palavras-chave: β-alanina, carnosina muscular, fadiga muscular, tamponamento intramuscular.
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Copyright (c) 2016 Victor Araújo Ferreira Matos, Nailton José Brandão de Albuquerque Filho, Victor Hugo de Oliveira Segundo, Thiago Renee Felipe, Leticia Castelo Branco Peroba de Oliveira, Gleidson Mendes Rebouças, Edson Fonseca Pinto
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