The main goal of supplementing with L-arginine in sports is to improve performance and training capabilities. It effectively enhances blood supply to the muscles (pump effect), resulting in better nutrient transport to muscle cells. L-arginine is an exogenous amino acid involved in the synthesis of biological compounds such as nitric oxide, agmatine, and creatine, and it affects many metabolic processes in the human body. The use of this supplement will improve the results achieved and also provide motivation for even better training.