Increase O2 delivery: When you exercise, your body burns more oxygen, which is carried by the blood. So the heart has to pump more blood. One way to do this is to increase heart rate.
Answered 8/31/2017
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
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