Re: Eating Disorders
It's a matter of having an internal orientation rather than external goals and measurements to live up to. When you are getting good physical feelings from training, it's pretty hard to overtrain or undereat - because you don't get those feelings.
If I were her, I would focus on just getting a good positive feeling about my body and what it's capable of doing. Building a base of training for a few years. After it might be possible to add in a competitive and group element such as what Crossfit provides, without being overwhelmed by the external aspects ....