Question

Why does pulse rate increase after running??

Answer 1

Explanation:

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.

Answer 2

Answer:

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When you are exercising, your muscles need extra oxygen—some three times as much as resting muscles. This need means that your heart starts pumping faster, which makes for a quicker pulse. Meanwhile, your lungs are also taking in more air, hence the harder breathing.