Kathleen Riser, a retired teacher, was overweight. She struggled with it daily until she finally got the courage to go to the gym. Once she was there, she lived the personal nightmare of millions of Americans. What happened? Not long into her visit she overheard a trainer say: "There's another one who will break our equipment," pointing at her 350-plus pound frame. The words of that trainer cut her to her core. They were cruel, but even worse, she felt they were true. The insult motivated her like nothing else. She worked hard for 2.5 years and now? She's a...