The Effect of Rubber Tire Modification Training on the Speed of the Sickle Kick of Naga Kembar Pencak Silat Athletes of Pasangkayu District - Zulkifli, Zulkifli; Purwanto, Didik; Sianto, Moh. Ihkal; Saparia, Andi (International Journal on Advanced Science, Education, and Religion, 2026)