“Pengembangan Instrumen Beep Test Berbasis Sensor Inframerah Untuk Akurasi Pengukuran Daya Tahan Aerobik Atlet”. Indonesian Journal of Sport Science and Coaching 8, no. 2 (September 14, 2026): 145–155. Accessed October 3, 2026. https://online-journal.unja.ac.id/IJSSC/article/view/58458.