As you watch the Olympics, you will notice that certain body types are more prevalent in certain sports. This is a matter of science calculating which body type is better suited to perform the various techniques involved in different sports.
The smart folks at AsapSCIENCE noted that in 1924, the year of the first Winter Olympics, most of the athletes had what would be considered average bodies, and that was thought to be ideal.
But since then as coaching and technology have improved, there has been a greater understanding of how the physics determine a better chance of success. For example, figure skaters have gotten shorter while hockey players are gotten bigger. As it states in the video below, "the average Joe Olympian is a thing of the past."