One thing I've always been irked about is how the term "ballet body" is used to describe a certain type of extremely thin, leggy dancer. For instance, Maria Kowroski is a perfect example -- I heard over and over again how she had the best "ballet body" because of her legs and feet. But she herself has said many times that her super-long legs, arched feet, and flexible back made her prone to injuries. So "ballet body" is being used just to describe a certain aesthetic.