To survive intense training every day and still not gain weight, ballet dancers have to count how many carbs they consume and cut down on sugar. This Japanese ballet dancer eats fish and other seafood, nuts, eggs, vegetables, fruits, lots of jelly to strengthen her ligaments, and tries to avoid meat. She gets around 600 calories for lunch. Many athletes stick to the same diet because it helps the body to use its own fat instead of gaining it from carbs.