i would certainly hope the gyms didn't tell bigger girls they had to get a full top. Depending on the athlete's build and body composition, sometimes the full top does more harm than good. like if it's ..idk bright purple, mystic spandex. I would probably feel more comfortable in a crop top at that point. it also depend's on the athlete's self confidence. if they want the crop top, then no one should tell them they can't wear it because of their size (if the rest of the gym is in crop tops.) It is nice if they give the full top option, though..