Putri VNE, Yudiana Y, Sidik DZ, Nugraha E, Jatmiko T. The OPT (Optimum Performance Training) method for 12 weeks increases strength and power of female athletes from the Indonesian National Beach Volleyball Team. SPORTIF [Internet]. 2024 Dec. 23 [cited 2024 Dec. 29];10(3):405-19. Available from: https://ojs.unpkediri.ac.id/index.php/pjk/article/view/23200