Marci AC. THE IMPORTANCE OF COMBINING MUSCULAR CONTRACTIONS DUTY FOR STRENGTH TRAINING, IN THE GAME OF TENNIS, FOR 11-12 YEAR-OLDS. Arena J. Phys. Act. [Internet]. 2013Dec.18 [cited 2026Apr.11];(2):9-16. Available from: https://uav.ro/jour/index.php/ajpa/article/view/169