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It depends on the type of excercise - is it vigorous cardiovascular excercise? Your heart pumps faster, circulating the blood more quickly to your lungs and subsequently the rest of the body. Your blood pressure rises and your skin flushes as the capillaries in your skin dilate to help dissipate heat and keep your body temp at a reasonable level. Your body then determines which organ systems require the most blood supply - in this case the musculoskeletal system. So vessels to your muscles dilate and deliver more blood while the vessels to your kidneys, digestive tract, etc will constrict and receive less blood. That's a very simplistic answer to a complex question.

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15y ago

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