Question

why does rate of heart beat increase after running

Answer 1

Your heart speeds up to pump extra food and oxygen to the muscles. Breathing speeds up to get more oxygen and to get rid of more carbon dioxide. When a fit person, such as an athlete, exercises the pulse rate, breathing rate and lactic acid levelsrise much less than they do in an unfit person.

Answer 2

After running,we need a more supply of oxygen,so we breathe faster and the heart rate increases.