Question

how does the heart rate change with exercise ​

Answer 1

here is your answer

During exercise, your heart beats faster to keep up with increased demands on your body. Specifically, it needs to beat faster in order to pump more oxygen-rich blood to your muscles, including the heart muscle itself. Therefore, it is normal to notice a more rapid heart rate after exercise.

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Answer 2

Answer:

The heart must beat faster during exercise because by increasing the heart rate, the body is able to increase cardiac output and deliver the necessary blood flow to the muscles. During exercise the body's muscles increase their activity level and consume more oxygen.

Explanation:

I gave you short answer.