There are 5 systems that re-synthesise ATP: two of them being anaerobic and three of them being aerobic.
The first energy system is the ATP/PC system, and it produces energy through a reaction where ATP-ase breaks down the triphosphate bond which releases energy when the bond is broken. For example, the energy system would be the main energy source for a 100 m sprint, or a short set of a weightlifting exercise. It can provide energy immediately, it does not require any oxygen and it does not produce any lactic acid. It does however have its negatives in that the ATP lasts only 10 seconds so can’t be used for long distance running for example.
The lactic acid system, like the ATP-CP system, is extremely important to us, primarily because it too provides for a rapid supply of ATP energy. For example, exercises that are performed at maximum rates for between 1 and 3 minutes depends heavily upon the lactic acid system for ATP energy. Also, in some performances, like running 1500 meters or a mile, the lactic acid system is used predominately for the kick at the end of a race. A disadvantage of this system is the by product which is lactic acid which makes the muscles sore. A positive of this energy system is also that it can be done both aerobically and anaerobically.
After about five minutes of exercise, Aerobic Glycolysis is the dominant energy system. Aerobic Glycolysis produces energy by breaking down muscle and liver glycogen stores with oxygen present. Because oxygen is present when this system is in use, there is no build up of lactic acid. This system does not produce energy as fast as the so the intensity of exercise cannot be as high as anaerobic systems. This system has the capacity to produce energy for an hour or more. This energy system is ideal for marathon or long distance running because it constantly produces ATP using oxygen. An advantage of this energy system is that it doesn’t produce harmful by products but a disadvantage is that there is a...