Assess students' ability to analyze how high-intensity interval training (HIIT) versus steady-state cardio affects aerobic and anaerobic energy systems, physiological adaptations (e.g., VO2max, lactate threshold, mitochondrial density, glycolytic capacity), and athletic performance in high school athletes. Include interpretation of provided physiological and performance data, comparison of expected outcomes for sprint/power versus endurance events, consideration of adolescent maturation and safety, and formulation of evidence-based training and periodization recommendations.