Besides a nucleus with DNA, the cells of the body consist of several different compartments (organelles), each with their own function. One of these is the mitochondrion, the power station of the cell. By means of oxidation and enzymes, this organelle breaks down nutrients (glucose and fatty acids) into an energy-rich phosphate compound, adenosine triphosphate (ATP).
When the ATP molecule loses its terminal phosphate, inorganic phosphate and energy is created. In this process ATP is reduced to adenosine diphosphate (ADP). If the ADP molecule loses a phosphate, it is further reduced to adenosine monophosphate (AMP) and phosphate, and again energy is released . If the body is exposed to large amounts of AMP it reacts with fatigue.
ADP is not necessarily reduced to AMP. It can regain its terminal phosphate by means of the protein cytochrome.
In combination with creatine, any reserve of ATP can serve as an energy source for the muscles of the back and the brain cells.
The body will prioritize the reduction of ATP before the reduction of ADP. This upholds the energy needed to maintain the vital functions of the body.
ATP is the main source of energy for muscle exercise, for transmission of nerve impulses, and for the construction of proteins, carbohydrates, and fat from their basic components.
Adenosine trihosphate is also available as tablets to be dissolved under the tongue.
For sports use, one can profit from a supplement both before and immediately after exercise.
Also see "Sports products".