Ali Mardius, Eri Barlian, & Nurul Ihsan. (2023). The Waist Flexibility and Reaction Speed to Sickle Kicks of Pencak Silat Perisai Diri Athletes. Journal for Lesson and Learning Studies, 6(1), 160–164. https://doi.org/10.23887/jlls.v6i1.61403