“The Effect of Preventive Exercises Using a Flywheel on Improving Eccentric Strength and Flexibility of the Hamstrings in Footballers”. Jurnal Pendidikan Kepelatihan Olahraga: PEJUANG 2, no. 3 (October 6, 2026): 158–165. Accessed October 9, 2026. https://journalpejuang.web.id/index.php/jurnalpkopejuang/article/view/196.