Oxygen debt occurs after which type of exercise?

Oxygen debt occurs after which type of exercise?

• A. During sleep
• B. After anaerobic exercise
• C. During aerobic exercise
• D. During warm-up

Answer: (B)

Oxygen debt is the extra oxygen the body must take in after intense, short-duration exercise to restore resting conditions. It happens because during high-intensity activity the energy demand is met mainly by anaerobic processes, producing lactate and using up stored fuels faster than oxygen can supply. After the activity ends, breathing and heart rate stay elevated to repay that deficit, replenish ATP and phosphocreatine stores, and oxidize the produced lactate. This recovery period is why oxygen debt is tied to anaerobic exercise. If the work is light and oxygen supply matches demand, there isn’t a significant debt to repay, and a warm-up doesn’t involve this post-exercise recovery.

Oxygen debt is the extra oxygen the body must take in after intense, short-duration exercise to restore resting conditions. It happens because during high-intensity activity the energy demand is met mainly by anaerobic processes, producing lactate and using up stored fuels faster than oxygen can supply. After the activity ends, breathing and heart rate stay elevated to repay that deficit, replenish ATP and phosphocreatine stores, and oxidize the produced lactate. This recovery period is why oxygen debt is tied to anaerobic exercise. If the work is light and oxygen supply matches demand, there isn’t a significant debt to repay, and a warm-up doesn’t involve this post-exercise recovery.