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How can swimming improves the cardiovascular fitness of a person?

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E X P L A N A T I O N - - - - - - -

---Swimming is an aerobic exercise, it strengthens the heart by helping it to become larger; making it more efficient in pumping — which leads to better blood flow throughout your body. 30 minutes of swimming a day can reduce coronary heart disease in women by 30 to 40 percent.

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Answer:

Swimming on a regular basis can improve heart contractility, decrease blood pressure, lower heart rate, and improve lung efficiency. Heart contractility is basically just the ability of the cardiac muscle to squeeze and relax, which pumps blood and oxygen from the heart to other parts of the body.

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