For example, during the 5 second mark of a 200 meter, there is a 54% contribution from the ATP-PC system, 29% from anaerobic glycolysis, 2% from the aerobic and 15% from stored ATP. Whereas at the 20 second mark, there is a 46% contribution from the anaerobic glycolysis system, 31% from the PC system, 21% from the aerobic and 2% from stored ATP/