Which energy system provides energy for a single maximal movement, such as a long jump take-off?

• A. Aerobic system
• B. Anaerobic glycolytic system
• C. Phosphagen system
• D. ATP-PC system

Answer: (D)

For a single maximal movement, energy must be available instantly and without relying on oxygen. The ATP-PC (phosphagen) system provides this immediate burst by using stored ATP and phosphocreatine in the muscles to rapidly regenerate ATP from ADP. Because the movement is extremely brief and requires peak power, there isn’t time for glycolysis or aerobic pathways to contribute significantly, making this the dominant energy source for that moment. The aerobic system is too slow to support such a rapid burst, and the anaerobic glycolytic system, while fast, leads to lactate production and is better suited to slightly longer high-intensity efforts. The ATP-PC and phosphagen descriptions refer to the same rapid-energy pathway, with ATP-PC being the precise label for this instant energy source.