Cardiopulmonary endurance is defined as the ability to perform sustained activities such as walking, arms overhead tests, and stepping tests.

• A. The maximum amount of oxygen the body can use per minute.
• B. The ability to perform high-intensity, short-duration tasks.
• C. The ability to perform sustained activities such as walking, arms overhead tests, and stepping tests.
• D. The rate of energy expenditure at rest.

Answer: (C)

Cardiopulmonary endurance is the ability to sustain prolonged physical activity, relying on the heart, lungs, and circulatory system to continuously supply oxygen and remove wastes during effort. The description of performing activities like walking, arms raised for extended periods, or stepping for a duration directly reflects that capacity to keep going over time, which is exactly what endurance measures.

The other concepts describe different aspects of fitness. The maximum amount of oxygen the body can use per minute (VO2 max) reflects peak aerobic capacity at a point of maximal effort, not the sustained performance over time. High-intensity, short-duration tasks measure anaerobic power and the ability to perform brief bursts of effort, not prolonged activity. The rate of energy expenditure at rest describes resting metabolic rate, unrelated to how long you can sustain activity.