I don't think pilates are in the plans of most of these competitors. I would also like to point out that long lean muscles vs huge bulky muscles are really not a product of training style as much as they are a product of hormonal state in the trainers body. Muscles only really grow or shrink, they don't really become "toned" or "bulky" . The female bodybuilders take substances that give them a more masculine physique.

You know those huge dudes you see on stage with veins popping out everywhere. They lift relatively light weight with high reps for a large part of the year. The rep range in the higher numbers doesn't necessarily mean you will get the "toned" look. These styles (low vs high) reps work different fibers and produce different results based on muscle composition, and training history. If you have been lifting high reps forever and start pushing around heavier weight in lower rep ranges you will likely notice and increase in muscle size since those previously underworked fibers are now being forced to adapt and grow. The same goes for those who work mostly low reps and switch to higher ones.