Anaerobic exercise is an intense activity that lasts a short period of time. This kind of exercise increases muscle power. Aerobic exercise is a moderate activity that lasts a longer period of time. This kind of exercise strengthens the heart. Which of the following is another difference between anaerobic and aerobic exercise?
A. In anaerobic exercise, muscles do not use oxygen; in aerobic exercise, muscles use oxygen.
B. In anaerobic exercise, muscles use hydrogen; in aerobic exercise, muscles use nitrogen.
C. In anaerobic exercise, muscles use helium; in aerobic exercise, muscles uses methane.
D. In anaerobic exercise, muscles do not use oxygen; in aerobic exercise, muscles use carbon dioxide.