Why are the ATP-PCr and glycolytic energy systems considered anaerobic?

Answer 1

The ATP-PCr and glycolytic energy systems are considered anaerobic because they do not require oxygen to produce energy. The ATP-PCr system generates immediate energy by breaking down phosphocreatine to replenish ATP, while the glycolytic system breaks down glucose or glycogen through glycolysis to produce ATP without the need for oxygen. Both systems are utilized during high-intensity, short-duration activities, where oxygen supply is insufficient to meet energy demands.