Which statement best describes aerobic exercise in relation to oxygen delivery?

• A. Aerobic exercise decreases the need for oxygen.
• B. Anaerobic exercise requires oxygen delivery; aerobic does not.
• C. Aerobic exercise involves sustained activity where the heart can supply the oxygen that the muscles need.
• D. All exercise is the same in terms of oxygen use.

Answer: (C)

Aerobic exercise relies on delivering enough oxygen to working muscles so energy can be produced through oxidative pathways over time. When you move at a steady, moderate pace, the heart and lungs work together to supply the muscles with the oxygen they need, allowing sustained activity to continue. This ongoing oxygen delivery is what makes the activity aerobic, distinguishing it from short, high-intensity efforts that rely more on non-oxidative energy systems. As you train, your body becomes better at delivering and using oxygen (your aerobic capacity), which lets you perform longer at a given intensity.