From an exercise physiology point of view, it's generally accepted that ATP-CP powered motility is possible for only about 10 seconds (that is to say, you only

From an exercise physiology point of view, it's generally accepted that ATP-CP powered motility is possible for only about 10 seconds (that is to say, you only store enough ATP for about 10 seconds of high intensity work -- sprinting, maximal weight lifting, etc). After that, other energy systems become dominant ... both of which create ATP but depend on either glycolysis (anaerobic) or oxidative phosphorylation (aerobic) for the process/conversion.