Seriannuari, Fatwa Aulia, Topo Yono, and Ahmad Sulaiman. 2024. “Do Exercise for 4 Weeks Using Rubber to Increase the Speed of Gyaku Tsuki Karate Punches Gokasi Karate Athletes Aged 16-20 Years?”. Jurnal SPORTIF : Jurnal Penelitian Pembelajaran 10 (3):390-404. https://doi.org/10.29407/js_unpgri.v10i3.23115.