Validity of the Sit and Reach Test for Hamstring and Low Back Flexibility: A Systematic Review. COMPETITOR: Jurnal Pendidikan Kepelatihan Olahraga, [S. l.], v. 18, n. 1, p. 0013–0025, 2026. DOI: 10.26858/cjpko.v18i1.468. Disponível em: https://competitor.idjournal.eu/index.php/competitor/article/view/468. Acesso em: 1 feb. 2026.