Now no way you can look at these guys and think what you are seeing is all color. However It is not a simple as saying swiming makes you look like this and sprinting makes you look like this. Basoth groups have vastly different genetics. Sprinter much more fast twist muscels. That is why they can sprint. The work out routing also
vastly different. Sprinter is not normally thought of when you think of cardio most whould think more of distance runners. Looke at these guys and you would get a very different picture. Again very different genetics and workout routine. However both groups of runners will have less body fat under the skin than swimmers.