Why is that when someone runs/jog, the heart beats faster?
When someone runs the muscles are used much more than if the person was at rest. This means the muscles need to be fed more oxygen. When running you will find yourself breathing heavier. This is to bring more oxygen into the lungs, which feeds the oxygen into the blood stream. The blood stream carries the oxygen to the heart, which in turn pumps it to the muscles. The more active the body, the faster the breath, and the faster the heart beat to feed the muscles.
Answers & Comments
Why is that when someone runs/jog, the heart beats faster?
When someone runs the muscles are used much more than if the person was at rest. This means the muscles need to be fed more oxygen. When running you will find yourself breathing heavier. This is to bring more oxygen into the lungs, which feeds the oxygen into the blood stream. The blood stream carries the oxygen to the heart, which in turn pumps it to the muscles. The more active the body, the faster the breath, and the faster the heart beat to feed the muscles.
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Answer:
because her heart typically beat faster so that more blood gets out to her body