IMPACT OF HIGH-INTENSITY INTERVAL TRAINING (HIIT) ON CARDIOVASCULAR ENDURANCE IN ADOLESCENT ATHLETES

Abstract

This study investigates the effect of High-Intensity Interval Training (HIIT) on cardiovascular endurance among adolescent athletes aged 14–17 years. Sixty participants were divided equally into experimental (HIIT) and control (traditional training) groups over an 8-week period. Cardiovascular endurance was measured using VO₂ max and the 12-minute Cooper Test before and after the training intervention. The results demonstrated a statistically significant improvement in cardiovascular endurance in the HIIT group compared to the control group (p < 0.05). These findings indicate that HIIT can be an effective, time-efficient training method to enhance endurance capacity in adolescent athletes, promoting both performance and health outcomes.