Process of redistributing blood during exercise

When you exercise blood flow is redistributed, less blood goes to all your major organs except for the heart and brain and more blood flows to the muscles and skin. Arteries dilate during exercise in the working muscle and blood flow increases through the capillaries. The increases flow of blood to the muscles increase the exchanges of oxygen. The nervous system prepares the body for exercise by passing hormones which signals the dilation of the blood vessels in the heart and working muscles these systems act more efficiently to redistribute blood. Blood redistribution takes a few minutes. If you suddenly stopped exercising it can leave you light headed due to the reduction of pumping action from the leg muscles to return blood to the heart and if you suddenly start exercising it can leave you breathless and strain any muscle which is not prepared to do exercise. The amount of capillaries in working muscles increases however the blood becomes thinner to ensure it flows better through the capillaries. Thinning the blood flow through these more water and dissolved proteins are added to the plasma volume. So the plasma volume is increased and the concentration of red blood cells decreases.