THE FUNDAMENTAL MECHANISMS AT THE LEVEL OF THE BODY MUSCLES NECESSARY IN SUSTAINING AND AMPLIFYING THE EFFORT IN MODERN TENNIS. University Arena, [S. l.], v. 6, n. 3, 2025. DOI: 10.62229/UaVi_3_20-5. Disponível em: https://journals.unibuc.ro/index.php/ua/article/view/833. Acesso em: 30 may. 2025.