Anwarudin, M., Iqbal, M., & Norito, T. B. (2020). Correlation of blood muscle strength and waist flexibility to students’ roundhouse kick skills in Putera Sekar (Pencak Silat) academy. ETUDE: Journal of Educational Research, 1(1), 7–12. https://doi.org/10.56724/etude.v1i1.16