Energy systems (biology)

Energy systems in biology refer to the processes our bodies use to produce, store, and utilize energy needed for activity and survival. The three main systems are: the ATP-PC system, which provides quick energy for short bursts; glycolysis, breaking down carbohydrates for moderate efforts; and the aerobic system, using oxygen to sustain long-duration activities. These systems work together, switching based on exercise intensity and duration, to supply the energy our muscles and organs need. Understanding these systems helps explain how we perform at different physical demands and how the body adapts over time.