The truth about exercise addiction: understanding the dark side of thinspiration

What it is : defining exercise addiction

What it looks like : the signs and symptoms of exercise addiction

Who coined it? : a brief history of exercise addiction

How it begins : the origins of exercise addiction

What it does : the short- and long-term health risks of exercise addiction

Why it happens : thinspiration's dark side

What it feels like : exercise addicts' true stories

What to do about it : treatment

How to approach someone with a problem

Frequently asked questions

Appendix A: How to get help : where to go, what to read, and to whom to reach out

Appendix B: Common exercise addiction measures.