what really causes the burn in anaerobic exercise
The burn comes from your musclesâ production of lactic acid. Lactic acid is produced when you exercise at an intensity high enough to exhaust the muscleâs supply of oxygen. The muscles need oxygen to break down the glucose that produces energy.Without the oxygen, it uses enzymes to break down the glucose, and lactic acid results as well.naerobic Exercise. Anaerobic exercise is exercise that occurs in the absence of oxygen. It is the type of exercise â as opposed to aerobic exercise, which occurs in the presence of oxygen â that leads to the burn feeling.