The first system is the Adenosine Triphosphate (ATP) is the immediate source for energy that is stored in muscle cells. As the phosphate is broken down (there are 3 of them for each molecule of ATP) energy is released. This system is only good for very quick and powerful movements.Then, ATP runs out and much be re-synthesized so the process can be repeated. Oxygen is not required for this to work, there are no waste products, but it is extremely short in duration. This system will last for about 0.5 minutes.his system is only good for very quick and powerful movements. Then, ATP runs out and much be re-synthesized so the process can be repeated. Oxygen is not required for this to work, there are no waste products, but it is extremely short in duration. This system will last for about 0.5 minutes.