Of a serious scientific nature, of course.
You may note in the photos (among other things you may note) that most of these athletes appear to have the more masculine hip style I’ve already remarked upon in modern-day gymnasts. Again, these hip shapes seem to be a question of selection for and then exaggeration of (through training) a certain basic body type in each sport.
Exceptions to this hip shape seem to be (to my eye, anyway) #10, Melanie Adams, vaulter; #14, Ivet Lalova, sprinter; #16, Sarah Galimberta, middle distance runner; #17, Allison Stoke, valuter; and #20, Leryn Franco, javelin thrower. Note that there are two vaulters and one javelin thrower in that list, sports that apparently favor more of a tall thin model type and less of a mesomorph than so many other sports do.
I’ve noticed this in watching the hop, skip, and jumpers (otherwise known as the triple jumpers) the other day. If you dressed these women differently, some of them might be models. They look like someone took a piece of woman-shaped taffy and then pulled and pulled and pulled.