The first place it goes to are the cardiac muscle cells, because the cardiac muscle cells actually contain special membrane bound proteins that can transport these lactate into the cell. Now, what happens to the lactate? Well, inside cardiac muscle cells we have a special enzyme known as lactate dehydrogenase. And what lactate dehydrogenase can do is it can basically transform the lactate molecules back into Pyruvate molecules. What for? Well, when we're running women's sprinting, not only are the skeleton muscle cells working, but the cardiac muscle cells are continually pumping that blood through the cardiovascular system.