Lamtiar RR, Sibarani EP. Correlation of Body Mass Index with Lumbar Flexibility in Obese Students at HKBP Nommensen University Medan. Jurnal EduHealth [Internet]. 2022 Sep. 30 [cited 2026 May 5];13(01):425-30. Available from: https://ejournal.seaninstitute.or.id/index.php/healt/article/view/2793