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EPOC is excess post-exercise oxygen consumption - AQA - GCSE Physical Education - Question 12 - 2023 - Paper 1
Question 12
EPOC is excess post-exercise oxygen consumption. Explain how EPOC is caused. Give a sporting example when EPOC is likely to occur.
Worked Solution & Example Answer:EPOC is excess post-exercise oxygen consumption - AQA - GCSE Physical Education - Question 12 - 2023 - Paper 1
Step 1
Explain how EPOC is caused.
Answer
EPOC, or excess post-exercise oxygen consumption, occurs as a result of the body's need to recover after intense physical activity.
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Caused due to vigorous (anaerobic) exercise: During high-intensity workouts, the body primarily relies on anaerobic respiration due to insufficient oxygen levels. This leads to the production of energy without adequate oxygen.
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Lactic acid is built up: The anaerobic process results in the accumulation of lactic acid in the muscles, which must be cleared out for recovery.
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Need to maintain an elevated breathing rate: To facilitate the breakdown of lactic acid and replenish oxygen levels, the body continues to breathe heavily even after exercise has stopped.
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To repay the oxygen debt: The increased oxygen consumption post-exercise helps in returning the body to its resting state and restoring energy levels.
Step 2