Creatine interacts with an enzyme process
called creatine kinase (CK) where it picks up a phosphate molecule and becomes creatine phosphate also called phosphocreatine (CP).
The phosphate group is removed from creatine phosphate by an enzyme
called creatine kinase, and is transferred to ADP to form ATP.
And what they were looking at was something
called the creatine kinase response as well as the testosterone response after the workout and the cortisol response after the workout.