What is oxygen debtWatch
Anaerobic respiration is when your cells make energy without enough oxygen, e.g. when you sprint. Then you pant afterwards to get more oxygen into your system. This is repaying the oxygen debt, to get rid of the build up of lactic acid (produced in anaerobic respiration and is why your muscles are always sore after intense exercise).
Anaerobic respiration: glucose-> energy+lactic acid
hope this helps