Dietary ?-Alanine Intake Assessed by Food Records Does Not Associate With Muscle Carnosine Content in Healthy, Active, Omnivorous Men and Women

Autor(es)

Rezende, Nathalia Saffioti ; Bestetti, Giulia Cazetta ; de Oliveira, Luana Farias ; Mazzolani, Bruna Caruso ; Smaira, Fabiana Infante ; Dumas, Alina ; Swinton, Paul ; Saunders, Bryan ; Dolan, Eimear

• Tipo de documento: Artigo Científico
• Fonte: INTERNATIONAL JOURNAL OF SPORT NUTRITION AND EXERCISE METABOLISM; v. N/A, p. 8-pg., 2023-03-24.

Resumo

beta-Alanine (BA) is one of the most widely used sport supplements, due to its capacity to improve high-intensity exercise performance by increasing muscle carnosine (MCarn) content, and consequently, the buffering capacity of the muscle. BA is also available in a variety of animal foods, but little is currently known about the influence of dietary BA intake on MCarn. The aim of the current study was to compile a detailed summary of available data on the BA content of commonly consumed foods, and to explore whether associations could be detected between self-reported dietary BA intake and skeletal MCarn in a group of 60 healthy, active, omnivorous men and women. Dietary BA intake was assessed via 3-day food records, and MCarn content assessed by high-performance liquid chromatography. A series of univariate and multivariate linear regression models were used to explore associations between estimated dietary BA and MCarn. No evidence of associations between dietary BA intake and MCarn were identified, with effect sizes close to zero calculated from models accounting for key demographic variables (f2 <= 0.02 for all analyses). These findings suggest that capacity to increase MCarn via dietary strategies may be limited, and that supplementation may be required to induce increases of the magnitude required to improve performance. (AU)

• Processo FAPESP: 19/05616-6 - A resposta óssea ao exercício: um programa de pesquisa translacional explorando aspectos clínicos e mecanísticos
• Beneficiário: Eimear Bernadette Dolan
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores
• Processo FAPESP: 21/06836-0 - Placebo em esporte e exercício: prevalência, condicionamento e placebo aberto
• Beneficiário: Bryan Saunders
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores - Fase 2
• Processo FAPESP: 22/09025-5 - A acidose modera a resposta metabólica óssea a uma sessão de exercício agudo?
• Beneficiário: Nathália Saffioti Rezende
• Modalidade de apoio: Bolsas no Brasil - Mestrado
• Processo FAPESP: 19/26899-6 - A resposta óssea ao exercício: um programa de pesquisa translacional explorando aspectos clínicos e mecanísticos
• Beneficiário: Eimear Bernadette Dolan
• Modalidade de apoio: Bolsas no Brasil - Jovens Pesquisadores