AUTHOR, D. S. Efforts to improve jumping skills using used tires as PJOK learning media for sdn students. Journal Activator, [S. l.], v. 1, n. 1, p. 90–99, 2023. Disponível em: https://journal-activator.borneokinetic.com/activator/article/view/15. Acesso em: 16 sep. 2025.