RT info:eu-repo/semantics/article T1 β-alanine supplementation in combat sports: Evaluation of sports performance, perception, and anthropometric parameters and biochemical markers—A systematic review of clinical trials A1 Fernández Lázaro, Diego A1 Fiandor, Emma Marianne A1 García Sierra, Juan Felipe A1 Busto, Natalia A1 Santamaría Peláez, Mirian A1 Gutiérrez Abejón, Eduardo A1 Roche Collado, Enrique A1 Mielgo Ayuso, Juan Francisco K1 Ergogenic aids K1 Nutrición - Alimentos K1 Sports - Physiological aspects K1 Deportes - Aspectos fisiológicos K1 Athletes - Nutrition K1 Atletas - Nutrición K1 Food additives K1 Supplementation K1 Sports performance K1 Estimacion de parametros K1 Anthropometry K1 Antropometría K1 Biochemical markers K1 Marcadores bioquímicos K1 Food science K1 β-alanine K1 3206 Ciencias de la Nutrición K1 3206.08 Nutrientes K1 3309.12 Aditivos Alimentarios K1 2411.06 Fisiología del Ejercicio AB β-alanine does not have an ergogenic effect by itself, but it does as a precursor for the synthesis of carnosine in human skeletal muscle. β-alanine and carnosine together help improve the muscles’ functionality, especially in high-intensity exercises such as combat sports. Therefore, β-alanine could be considered a nutritional ergogenic aid to improve sports performance in combat athletes. We aimed to critically review clinical trial evidence on the impact of β-alanine supplementation on sports performance, perception, and anthropometric parameters, as well as circulating biochemical markers in combat athletes. This systematic review was conducted following the specific methodological guidelines of the Preferred Report Items for Systematic Reviews and Meta-Analyses guidelines (PRISMA), the PICOS question model, the Critical Review Form of McMaster, and the PEDro scale. Furthermore, the Cochrane risk-of-bias assessment tool was used. The search was carried out in the SCOPUS, Web of Science (WOS), and Medline (PubMed) databases for studies published from the beginning of the database until July 31, 2023. Of the 41 registers identified, only 7 met the established criteria and were included in this systematic review. Overall, performance parameters related to strength, power, total exercise work capacity, and combat-specific parameters were significantly improved (p < 0.05). Perception parameters increased non-significantly (p > 0.05). Regarding biochemical parameters, carnosine increased significantly (p < 0.05), pH decreased non-significantly (p > 0.05), and the results for blood bicarbonate and blood lactate were heterogeneous. Finally, there was a non-significant (p > 0.05) improvement in the anthropometric parameters of lean mass and fat mass. β-alanine supplementation appears to be safe and could be a suitable nutritional ergogenic aid for combat athletes. PB MDPI SN 2072-6643 YR 2023 FD 2023 LK https://uvadoc.uva.es/handle/10324/66694 UL https://uvadoc.uva.es/handle/10324/66694 LA eng NO Nutrients, 2023, Vol. 15, Nº. 17, 3755 NO Producción Científica DS UVaDOC RD 22-may-2024