Why doea the heart beat faster during and after a physical exercise?
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Increased muscular work need increased amounts of oxygen which need to be delivered by the blood. This means that an increased volume of blood is needed. The heart can do this in two ways, pump a larger volume of blood per stroke or pump more often. Since the heart cannot drastically increase size, it needs to increase the heart rate.
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The heart must beat faster during exercise because by increasing theheart rate, the body is able to increase cardiac output and deliver the necessary blood flow to the muscles. ... When exercising many muscles willall require nutrients and elimination ofwaste products constantly at the same time.
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