You mean any individual athletes? Not that I can think of off the type of my head, but by "classes" earlier I was referring mostly to strength-based athletes or

You mean any individual athletes? Not that I can think of off the type of my head, but by "classes" earlier I was referring mostly to strength-based athletes or any sort of sport where there are weight classes/a need to be lean. So wrestling, weightlifting/powerlifting/etc., probably most fighting disciplines, bodybuilding.