Allright so when I had an eating disorder the first time I was a pretty healthy weight. Due to treatment centers and grouphomes I’ve gained a lot over the years and I’ve decided to work to get my body back. I’m super out of shape right now but I’ve been exercising anyways. How do I build my endurance? I need to stop getting winded so easily. I used to be able to do 500 sit-ups no sweat but no I’m dying after 20. What excercises does anyone recommend to work my way up to being able to handle legitimate excercise?