Competitive runners are, by nature of their activity, thin. Consequently, a runner with an eating disorder is hard to identify. But a sudden drop in weight or sudden increase in miles-run-per-week are possible indicators that something might be wrong. This was the case with Ellie, who mom and dad thought something might be wrong when she lost 15 pounds over one summer.

"Sharp was diagnosed with anorexia nervosa at age 12. At her sickest, Sharp was 5 feet 3 inches and weighed 80 pounds. 'There were times when we went to bed and didn't know if she'd be there when we got up,' said her mother, Cathy Sharp, wiping away tears."

Now a junior in high school, Sharp is healthy, and still runs. In fact, she's captain of her cross country team. Now she uses her experience to mentor younger team members and make sure they don't head down the same dangerous path.

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Labels: athletes, exercise, influences