Analysis of the Sports Class Program for Sustainable Young Athlete Development: (A Case Study at Muhammadiyah 2 Junior High School, Surabaya). Compet. J. Pendidik. Kepelatihan Olahraga [Internet]. 2025 Oct. 31 [cited 2025 Dec. 7];17(3):3106-19. Available from: http://competitor.ojsunm.ac.id/index.php/competitor/article/view/438