Physical Fitness and Self-Confidence: A Correlational Study on Badminton Extracurricular Students. COMPETITOR: Jurnal Pendidikan Kepelatihan Olahraga, [S. l.], v. 18, n. 1, p. 1317–1328, 2026. DOI: 10.26858/cpjok.v18i1.639. Disponível em: https://competitor.idjournal.eu/index.php/competitor/article/view/639. Acesso em: 6 jun. 2026.