Over the summer (July to August) I excercised a ton and ate around 700 calories. Swimming season started up in September and it's 5 days a week for two hours and I usually burn about 1500 calories, I now eat anywhere form 1000-1200 calories, but today I only ate 600. I don't know if I have an eating disorder but I'm 5' 8" and weigh 130 pounds. If it helps my mom had an eating disorder for eight years and the reason she quit was because she got pregnant with me.