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Validity of the Sit and Reach Test for Hamstring and Low Back Flexibility: A Systematic Review. Compet. J. Pendidik. Kepelatihan Olahraga [Internet]. 2026 Feb. 1 [cited 2026 Feb. 1];18(1):0013-25. Available from: https://competitor.idjournal.eu/index.php/competitor/article/view/468