Which energy system predominantly supports a final sprint to the finishing line?

• A. ATP-PC system
• B. Aerobic system
• C. Glycolytic system
• D. Oxidative phosphorylation

Answer: (A)

This question tests which energy system powers very short, high‑intensity efforts like a final sprint. The phosphagen (ATP-PC) system provides ATP immediately without oxygen, using stored phosphocreatine to recycle ADP into ATP in seconds. That rapid supply is exactly what a last‑minute sprint needs to generate maximal power and speed right at the finish. Once the quick phosphocreatine stores are depleted, energy must come from other systems, but they can’t match the speed of the phosphagen system for a true sprint. Anaerobic glycolysis can contribute a bit longer, producing ATP without oxygen but with lactate buildup and a slower rate, while the aerobic system (oxidative phosphorylation) is much slower and can’t sustain peak sprint power. So the ATP-PC system is the best fit for the final, explosive burst to the finish.