Resistance training is anabolic and promotes muscle growth, while some other exercises are catabolic.

“other types of exercises like resistance training or anabolic, they allow muscle to be put on. And there are some interesting studies, not a lot, but some interesting studies trying to encourage anorexics, not to stop exercising, but rather to stop exercising in this neurotic catabolic way of breaking oneself down, but rather getting them shifted toward breaking habits of only approaching low calorie, low fat foods, while also encouraging them to embark on resistance training and to start to learn and reward the relationship between exercise for sake of making one's body strong, including the bones, not just the muscles, but the bones, which is important, especially in anorexics.”