Anaerobic-alactacid energy supply

Anaerobic-alactacid energy production is a form of anaerobic metabolism. In this form, the breakdown of the energy-rich phosphates adenosine triphosphate (ATP) and creatine phosphate (KrP) occurs without the involvement of oxygen and without lactate formation. This form of energy supply is used when large amounts of energy are required per unit of time. However, it is limited in time to 7-10 seconds, because the energy source is very limited due to the splitting off of the phospates.

However, the energy-rich phosphates adenosine triphosphate (ATP) and creatine phosphate (KrP) consumed in the process are also very quickly restored. Depending on the state of training, this can take from a few seconds to a few minutes. For some years now, the high-dose intake of creatine has been common in strength and sprint sports in order to thereby increase the creatine phosphate storage of the muscles. 

In cycling diagnostics, this area of energy supply can be partially mapped in power profiling with critical power over 5 or 10 seconds. In practice, however, such a load is never a purely anaerobic-alactic energy supply, but always a mixed form. Aerobic metabolism and anaerobic metabolism are also involved.