Siregar, Zulfikar, Soegiyanto Soegiyanto, and Tri Rustiadi. “Reaction Speed Training Sensor Aids Development for Taekwondo”. Journal of Physical Education and Sports 10, no. 3 (September 30, 2021): 223-231. Accessed November 22, 2024. https://journal.unnes.ac.id/sju/jpes/article/view/47192.