Assess students' understanding of how the three primary energy systems (ATP-PCr, anaerobic glycolysis, and aerobic oxidative phosphorylation) contribute to ATP resynthesis across varying exercise intensities and durations. Include factors that shift system dominance (intensity, duration, recovery, substrate availability), relevant physiological markers (lactate accumulation, VO2 kinetics, PCr depletion), and practical implications for training prescription and event-specific energy demands. Expect interpretation of example activities (e.g., 100 m sprint, 400 m run, 5 km race, long-distance cycling) and explanation of transitional dynamics and system overlap.