Effects of interval training on cardiovascular endurance and heart rate recovery in competitive male adolescent soccer players. Jurnal SPORTIF : Jurnal Penelitian Pembelajaran, [S. l.], v. 12, n. 2, p. 250–263, 2026. DOI: 10.29407/js_unpgri.v12i2.28638. Disponível em: https://ojs.unpkediri.ac.id/index.php/pjk/article/view/28638. Acesso em: 20 aug. 2026.