Phosphagens are compounds that possess a high-energy phosphate bond that when broken produces energy that can be used to drive biochemical reactions such as muscle contraction, active transport, and biosynthesis. Adenosine triphosphate (ATP) is most commonly used for these purposes within the body. Another important phosphagen is creatine phosphate, which is used extensively to restore ATP levels during strenuous activity.
Several chemicals, including phosphocreatine, that release energy when split. They are high-energy phosphate compounds.
System Anaerobic system that rapidly produces energy through the breakdown and resynthesis of high-energy phosphagens (not carbohydrate). This system can supply only a few seconds of energy.