Question

When do lactic acid form?

Answer 1

lactic acid forms when we do heavy exercise. thats why our muscle starts breaking down food anaerobicly

Answer 2

When we exercise for a long time we run short of oxygen. The muscles in our body continue to respire but anaerobically for some time. This does not allow the proper breakdown of the food and lactic acid gets formed in the muscles and joints. This results in cramps.

Hope it helps.
Thank You