Oxygen Debt & Anaerobic Exercise Simplified Revision Notes for GCSE AQA Physical Education

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Oxygen Debt & Anaerobic Exercise

Excess Post-exercise Oxygen Consumption (EPOC)

infoNote

EPOC is the additional amount of oxygen consumed after anaerobic exercise. Sometimes EPOC is referred to as oxygen debt

EPOC

Refers to the amount of oxygen needed to recover after exercise
Enables lactic acid to be converted to glucose, carbon dioxide and water
Explains why we breathe deeply and quickly after vigorous exercise

Analysing EPOC

Explanation

The resting requirement identifies how much oxygen is required at rest
When we start to exercise the demand for oxygen increases. it takes time to get the oxygen to the working muscles, not all the oxygen can be provided (anaerobic) we get an O₂ deficit
When we stop exercising the demand for oxygen remains higher (to pay back the deficit) this is EPOC

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