Effect of β-alanine Supplementation and Training on Ergogenic Measures and Plasma Metabolites in Untrained Young Adults

Inclusion Criteria: * Healthy young adults aged 18-30 years. * Untrained individuals without participation in structured resistance or endurance training during the previous 6 months. * Not physically inactive, but not engaged in regular structured exercise training. * Ability to participate in a six-week supervised multicomponent exercise training program. * Willingness to comply with study procedures, training sessions, and supplementation protocol. * Provision of written informed consent. Exclusion Criteria: * Known cardiovascular, metabolic, neuromuscular, or musculoskeletal disease. * Acute injury at the time of enrollment. * Regular use of medications or dietary supplements affecting muscle metabolism or exercise performance. * Participation in structured resistance or endurance training during the previous 6 months. * Failure to comply with the study protocol or training requirements.