To compensate for the body requiring more oxygen because of exercising
During vigorous exercise the heart is moving more oxygenated blood into the muscles, so it has to pump faster.
When you are exercising your heart rate goes up, because your heart is pumping faster.
Exercising
When you are exercising, you are breathing in oxygen (O2) and it is get the heart to pump more blood to your body
Exercising requires energy which requires oxygen to make. After the initial burst of energy is used up, not enough oxygen is being supplied to the heart so it then must work harder to pump blood. Therefore the lack of energy causes lack of oxygen causes heart to beat faster to compensate.
After
while resting our heart doesn't have to work as hard but while we are exercising that causes more blood to pump through our body causing it to beat faster than usual
Yes because for example when your running, your heart is beating faster and faster every minute maybe even every second.
Exercising. Whatever always your heart beat go faster.
your heart will pump faster
It depends. If you are doing it with someone you love, you might get nervous and your heart will pump faster. If you are doing something you love, you should be calm and your heart shouldn't be beating fast.
If heart rate drops below 60, it is called bradycardia. And, during exercise, the body consumes a lot of energy, to fulfil this requirement of the body, the heart has to pump faster. In bradycardia, heart beats slowly and it is dangerouse as it might not be able to pump blood for the requirement of tissues especially brain, therefore it is very dangerous to have bradycardia after exercise.