The fatigue experience is due to lactic acid accumulated in the muscles in the shortage of oxygen, a condition which may be called ____________.

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Solution

Oxygen debt:
Oxygen debt is a temporary shortage of oxygen in the body tissues arising from the exercise.
Oxygen debt is the oxygen required (after vigorous exercise, using up the oxygen faster than it can be breathed in) to oxidise lactic acid, created from anaerobic cellular respiration.
Final answer: The fatigue experience is due to lactic acid accumulated in the muscles in the shortage of oxygen, a condition which may be called oxygen debt.

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