Which energy system is primarily used for very short, high-intensity efforts such as a 60-meter dash?

• A. Adenosine triphosphate-phosphocreatine (ATP-PC) system.
• B. Glycolytic system.
• C. Oxidative system.
• D. Lactic acid system.

Answer: (A)

The energy for a very short, all-out sprint comes from the phosphagen (ATP-PC) system because it uses the muscles’ immediate stores of ATP and phosphocreatine to generate energy instantly without oxygen. These stores are ready at the start and can power maximal effort for roughly up to 10 seconds, which aligns with the typical duration of a 60-meter dash. Because it delivers energy so rapidly, it is the dominant source for this kind of race. Once those stores are depleted, other systems take on a larger role—glycolysis becomes more involved for longer bursts and oxidative metabolism remains minimal for such a brief effort. The oxidative system supports endurance, and the lactic acid term is tied to glycolysis’ byproducts and becomes more relevant as efforts extend beyond a few seconds.