Anwarudin, M., Iqbal, M. and 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), pp. 7–12. doi: 10.56724/etude.v1i1.16.