Final answer:
Phosphocreatine takes about 3-5 minutes to fully replenish after maximum effort exercise.
Step-by-step explanation:
Phosphocreatine, also known as creatine phosphate, is a molecule that stores energy in the muscle. After performing maximum effort exercise, it takes approximately 3-5 minutes to fully replenish the stored phosphocreatine levels. This is because phosphocreatine is used as a rapid source of energy during intense exercise, and it takes some time for the body to restore it through various biochemical processes.