Question

Why does the rate of heart beat increase running

Answer 1

(Because your leg muscles use more energy to go fast. That energy comes from the blood and oxygen that the heart supplies. So when your leg muscles work harder, your heart has to work harder to supply blood faster.) ... You can also use your heart rate to tell if you have recovered because it should be slow again.)

Answer 2

while running we take more oxygen so that's why the heart beat will be increase I hope it is the correct answer