Effects of Core Strength Training Using Stable Versus Unstable Surfaces on Lower Body Quality in 8th Grade Male and Female Students in a Junior High School in Bandung. IJIHS [Internet]. 2018 Mar. 29 [cited 2026 Jul. 23];6(1):11-2. Available from: https://journal.fk.unpad.ac.id/index.php/ijihs/article/view/1050