EVERYDAY SCIENCE

Detailed explanation-1: -This burning sensation is associated with a buildup of acid in the muscles during intense exercise, and lactic acid has long been thought to be the culprit in that acid buildup, known as acidosis. Lactic acid is a byproduct of anaerobic metabolism, in which the body produces energy without using oxygen.

Detailed explanation-2: -If you start doing intense physical activity faster than your body can get oxygen to your muscles and other tissues, your cells break down glucose to create the energy you need to keep moving (anaerobically). Lactic acid is created when you’re generating energy anaerobically.

Detailed explanation-3: -Lactic acid fermentation is the process by which our muscle cells deal with pyruvate during anaerobic respiration. This happens when we exercise too fast or hard because the oxygen supply can’t keep up with the need. That’s when our muscles switch from aerobic respiration to lactic acid fermentation.