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health advisory Diet Diet 2007-11-11 21:06:02

Can you please give me a explination why or give me a site Ty

Answer:

Your heartrate increases because when you exercise your body needs more oxygen--thus your heart (the body's official oxygen pump) increases its muscle contractions and rate to give your body more oxygen as your activity increases...

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to pump more blood to your body, thus delivering more oxygen and nutrients to keep up with the higher output of the exercise.

Ed, RN

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How the heart responds during exercise

Several things happen to your heart while you exercise. First, your heart rate, that's the number of times your heart beats per minute, increases to pump more blood to the muscles all over the body which are working harder. Therefore, your cardiac output increases. The heart rate and the cardiac output are proportional to each other.

The other factor in this proportional equation is the stroke volume. An average adult's stroke volume is about 70ml.

I got it from here: (there is more on the page)

http://www.bbc.co.uk/schools/gcsebitesiz...

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Your heart pumps blood through your system. It takes oxygen to your muscles and removes waste (lactic acid) in the process. When you exercise, your muscles need more oxygen and need to have more waste removed. Your breathing increases to take in more oxygen and your heart rate increases to pump more blood through your system. Check out the link below on heart rate training. Good luck!

- Mike

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when you work your body, blood gets pumped throughout your entire body. as your heart pumps more blood, it is moving faster, hence a faster heart rate. its pretty simple actually but im glad to help

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