this is an energy system that uses phosphocreatine (PC) as its fuel. PC is an energy richphosphate compound which is found in the sarcoplasm of the muscles and can be broken down quickly and easily to release energy to re-synthesis ATP. it is a high intensity compound.
how does it provide energy?
when ATP levels in the muscles fall - this activates an enzyme called creatine kinase. it breaks down the phosphocreatine in the muscles to phosphate and creatine, releasing energy. this energy is then used to convert ADP to ATP in a coupled reaction.
