Question

An athlete felt severe pain in his muscles after finishing race, why ?​

Answer 1

Answer:

Lactic acid is often used to describe the pain felt during strenuous exercise and the cause of sore muscles, cramps and fatigue afterwards. But Dr Steve Ingham, head of physiology at the English Institute of Sport, says lactic acid has had a bad press. "It's a natural consequence of training hard.

Answer 2

Answer:

Aneorbic respiration that is taking place in our muscles. I think this is the answer.