ATP-PC: The Phosphagen System
PC is an abbreviation for phosphocreatine. PC, like ATP, is stored in the muscle cells, and when it is broken down, a large amount of energy is released. The energy released is coupled to the energy requirement necessary for the resynthesis of ATP.
The total muscular stores of both ATP and PC are very small. Thus, the amount of energy obtainable through this system is limited. In fact, if you were to run 100 meters as fast as you could, the phosphagen stores in the working muscles would probably be empty by the end of the sprint. However, the usefulness of the ATP-PC system lies in the rapid availability of energy rather than quantity. This is extremely important with respect to the kinds of physical activities that we are capable of performing.
Read more about this topic: Energy Systems
Famous quotes containing the word system:
“Short of a wholesale reform of college athletics—a complete breakdown of the whole system that is now focused on money and power—the women’s programs are just as doomed as the men’s are to move further and further away from the academic mission of their colleges.... We have to decide if that’s the kind of success for women’s sports that we want.”
—Christine H. B. Grant, U.S. university athletic director. As quoted in the Chronicle of Higher Education, p. A42 (May 12, 1993)