From "Fitness the complete guide" text book for ISSA Fitness training course...
Your body uses Creatine Phosphate for fuel after it depletes your ATP.
Creatine Monhydrate has been clinically used in improving plasma creatine concentrations by as much as 50%. Reshearch shows this substance to be effective in improving training intensity and recovery. It is able to pass through the gut wall and into the bloodstream intact, and upon entering the muscle cell, is converted into creatine phosphate Creatine phosphate(CP) in an orgainic compond in muscle fibers that is fractured enymatically for production of ATP, the bodys basic fuel that generates contractions.
ATP and CP are stored in muscle cells and function as a pool of immediate energy. The bigger the amounts in the muscle, the more the muscle can lift and perform short term maximum strenght performance. CP is used to quickly replenish ATP in fast twitch glycolytic muscle fibers. This process take only a fraction of a second. Contuine high intensity levels of performance cause fatigue to set in from meatbolic waste products.(Latic Acid) Creatine loading can therefore result in improving trainging intensity and recovery in anaerobic sports by loading up the resting muscles resting reserve of creatine phosphate. In other words, the more creatine phosphate the muscles have on hand, the more ATP can be replenished during burst of all out effort.
AWARE72: Interesting information you found. I've never heard of Creatine Phosphate being used as a muscular energy source. I always thought it was the ATP the muscle uses for energy. The creatine (I always thought) only hydrated the muscle, making it larger and able to perform more work. Learn something new each day.