Kusuma, A. I., Rosmi, Y. F., Ariani, L. P. T., & Utamayasa, I. G. D. (2026). The Synergy of Wearable Optical Heart Rate Sensor Technology and Box Breathing in Real-Time Decision Making in Precision, Explosive, and Intermittent Sports. Physical Education Theory and Methodology, 26(1), 157–167. https://doi.org/10.17309/tmfv.2026.1.15