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What causes my hands to swell after running for 1-2 hours?

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What causes my hands to swell after running for 1-2 hours?

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The swelling is a build up of fluid and is quite normal. When you exert yourself such as when you run, blood is concentrated in the areas most needed, such as your heart,lungs and legs, circulation to the extremities, such as the hands is reduced. Simply put, when blood circulates around the body, fluid leaks from the capillaries into the tissues, carrying oxygen and nutrients, this fluid is then collected via the lymphatic system (lymphatic return), lymphatic return and blood circulation are closely linked, so when circulation is slowed down, so is lymphatic return, this means that the fluid in the tissues remains there until circulation increases. As I said it is quite normal, and, if you are healthy, the swelling soon disappears.

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