Robb Wolf has some interesting comments about performance vs aesthetics in sports.
Of course bodybuilders, dances, wrestlers, and gymnasts are most prone to eating disorders .
From Robb's page :
A simple google search with the terms "eating disorders by sport" clearly shows that the more AESTHETICS oriented a sport the more likely are eating disorders. Track & Field, basketball, volleyball tend to focus on performance and have a relatively low occurrence of eating disorders relative to dance and gymnastics. Wrestling produces a fair number of eating disorders due to the constant obsession with WEIGHT. Performance is almost forgotten in favor of trying to take as large an athlete as possible, dry him out, then hope you can bring them back to life for the event. In contrast, many jiu-jitsu tournaments require that competitors weigh-in immediately before a match.