Question

So why does our heart beat faster when we exercise?

How about muscle cramps?

Answer 1

Our heart beats faster because we are making our bodies work harder, and faster.

Answer 2

during exercise, your body may need three or four times your normal cardiac output, because your muscles need more oxygen when you exert yourself. During exercise, your heart typically beats faster so that more blood gets out to your body.

Step-by-step explanation: