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SubscribeVenous return mechanisms
Venous return is the return of blood to the right side of the heart via the vena cava. Up to 70% of the total volume of blood is contained in the veins at rest. This means that a large amount of blood can be returned to the heart when needed. During exercise, the amount of blood returning to the heart (venous return) increases. This means that if more blood is being pumped back to the heart then more blood has to be pumped out, so stroke volume will increase
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