RESUMEN
The purpose of this study was to investigate the psychological and physiological factors affecting performance levels in adolescent judokas. The research was performed in the "Sport EMI" scientific-research center of Armenian State Institute of Physical Culture and Sport. Participants' performance levels were assessed based on their kyu rankings, a hierarchical ranking system in judo. The psychological assessment involved the completion of the Well-being, Activity, and Mood (WAM) test. The physiological assessment focused on heart rate variability (HRV) measurements, which were obtained using the Varikard 2.51 complex equipment. A total of 23 male teenage judokas, aged between 10 and 16 years, were randomly selected from a judo club to participate in this study. Participants demonstrated high levels of well-being, activity, and positive mood, indicating positive psychosocial outcomes associated with judo practice. Analysis of heart rate variability (HRV) revealed deviations in certain variables, suggesting potential irregularities in autonomic nervous system regulation. Specifically, the Index of Activity of Regulatory Systems (IRSA), low-frequency power (LF), and total power (TP) exceeded normal ranges, indicating increased tension and overall activity in the regulatory systems. In addition, one-way analysis showed significant main effects of age, training duration, and high-frequency power (HF) on the participants' performance level (Kyu). The findings suggest that psychological and physiological factors play significant roles in the performance levels of adolescent judokas. Coaches and practitioners should consider both aspects in optimizing training strategies for young athletes.