Chul Yoon, and Jae-Woong Yang. 2023. “Heart Rate Recovery (HRR%) Variation by Position and Measurement Time After Imitation Sparring in Male Jiu-Jitsu Trainees With White Belt”. Revista De Psicología Del Deporte (Journal of Sport Psychology) 32 (4):287-97. https://rpd-online.com/index.php/rpd/article/view/1423.