Which statement best describes the difference between aerobic and anaerobic exercise?

The statement indicating that aerobic exercise requires oxygen and is longer in duration, while anaerobic does not, accurately captures the fundamental differences between these two types of exercise.

Aerobic exercise is characterized by activities that enhance cardiovascular endurance and typically involve steady, sustained efforts over extended periods. During aerobic activities, the body relies on oxygen to fuel the muscles, engaging in continuous movements that can last from several minutes to hours, such as running, swimming, or cycling.

In contrast, anaerobic exercise refers to high-intensity efforts that rely on energy sources stored in the muscles, rather than directly using oxygen for fuel. This type of exercise generally consists of shorter bursts of activity, such as sprinting or heavy weight lifting, making it unsustainable for long durations.

Recognizing this distinction is vital for developing effective training programs and understanding how each type of exercise contributes to fitness, endurance, muscle strength, and overall health. The other options do not accurately represent these key physiological mechanisms or the nature of the exercises involved.