How long does it take for 50% of phosphocreatine stores to replenish during EPOC?

How long does it take for 50% of phosphocreatine stores to replenish during EPOC?

• A. 1 minute
• B. 2-4 minutes
• C. 4 minutes
• D. 30 seconds

Answer: (D)

Phosphocreatine resynthesis happens very quickly once you stop exercising, because the body can rapidly supply ATP from aerobic metabolism to drive the creatine kinase reaction that regenerates phosphocreatine. In the early moments of recovery, about half of the depleted phosphocreatine stores are replenished in roughly 30 seconds. Full restoration takes a few minutes, but the key point is that this halfway point happens in about half a minute. This rapid recharging helps you be ready for another burst of activity if needed.

Phosphocreatine resynthesis happens very quickly once you stop exercising, because the body can rapidly supply ATP from aerobic metabolism to drive the creatine kinase reaction that regenerates phosphocreatine. In the early moments of recovery, about half of the depleted phosphocreatine stores are replenished in roughly 30 seconds. Full restoration takes a few minutes, but the key point is that this halfway point happens in about half a minute. This rapid recharging helps you be ready for another burst of activity if needed.