What is Anaerobic Threshold

Muscles burn glucose in two ways aerobic and anaerobic (with or without the presence of oxygen). The anaerobic way (without the presence of oxygen) delivers energy faster but the byproduct from it is lactic acid.

When during anaerobic exercise lactic acid starts builds up faster then it is removed, a person reaches his anaerobic threshold. At that point we get the well-known feeling of fatigue and pain.

An athlete can increase his/her anaerobic threshold through exercise. HIIT cardio is one of the physical activities, which contributes to this process.