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Energy system can refer to: 1  Electric power system, for supply, transmission and consumption of electric power. 2  Thermodynamic system, a physics concept for analysis of thermal energy exchange. 3  Bioenergetic systems, metabolic processes for converting energy in living organisms.
Muscle Energy Systems. ATP (Adenosine Triphosphate) is a complex chemical compound formed with the energy released from food and stored in all cells, particularly muscles. When our brain sends signals to our muscles to contract, energy stored in the form of ATP is converted into the energy to drive the movement of the muscles. Every muscle cell has a small amount of ATP floating around which can be used readily however this is used off very quickly and must constantly be replenished.