Question

During hard exercise/running, what causes an oxygen debt? *
3 points
1Build-up of lactic acid
2Build-up of CO2
3Build-up of O2
4Depreciation of lactic acid​

Answer 1

Answer:

increased productions of lactic acid causes oxygen debt this is common in the case of vigorous work outs from non athletes.

Explanation:

This happens due to inadequate supply of O2 to muscles. Once there is a lack of O2 in muscles they start respiring anaerobically thus, producing lactic acid along with only 2 moles of ATP

Answer 2

Answer:

There is a build-up of lactic acid in the muscles during vigorous exercise. The lactic acid needs to be oxidised to carbon dioxide and water later. The creation of lactic acid (which needs oxygen to be broken down) generates an oxygen debt that needs to be repaid after the exercise stops.