Anaerobic endurance is best described as

• A. The ability to run a marathon without stopping.
• B. The time you can exercise with continuous oxygen supply.
• C. Is exercise intense enough to trigger anaerobic metabolism.
• D. The degree of flexibility in joints.

Answer: (C)

Anaerobic endurance is about how long you can keep working at a high intensity when your body can’t rely on oxygen alone to keep generating energy. At those intense levels, the body uses anaerobic pathways to quickly produce ATP, which powers short, powerful bursts but leads to fatigue from lactate buildup and energy depletion. That’s why the best description is that the activity is intense enough to trigger anaerobic metabolism.

The other ideas describe different things: a marathon relies mainly on aerobic energy over a long duration, sustained oxygen supply is characteristic of aerobic endurance rather than anaerobic, and joint flexibility isn’t about endurance at all.