STUDYING THE EFFECTS OF PHYSICAL EDUCATION AND SPORTS TRAINING LOADS ON THE CHILD'S ORGANISM

Physical education and organized sports are essential components of healthy childhood development, yet the growing organism reacts differently to physical loads compared to the adult body. The present research analyzes how different intensities and structures of physical activity influence functional adaptation, fatigue formation, recovery processes, and behavioral responses in children aged 9–12 years. A twelve-week pedagogical experiment was conducted in which children participated in structured physical education lessons and extracurricular sports sessions. Physiological indicators, motor performance changes, and psycho-emotional reactions were monitored continuously. The results demonstrated that gradually increased moderate loads enhanced cardiovascular efficiency, coordination accuracy, and endurance capacity, while excessive repetitive high-intensity work caused delayed recovery, decreased concentration, and functional fatigue accumulation. The research confirms that proper load dosage and alternation of activity intensity are decisive factors in ensuring safe physical development. The findings provide a scientific basis for health-oriented organization of children’s training and highlight the importance of balancing development and protection of the growing organism.