I was divorcing my husband by my choice....and I was FAT. I was miserable. I hurt all of the time, all over. I could barely do my job because I would get out of breath doing the physical part of nursing. I got a new job, and on my second day my Charge Nurse told me, "You're going to have lose weight if you're going to work here," after I got out of breath during a patient cardiac arrest. A few weeks after that, I realized it was time. I started walking. It was all I could do. I also started counting calories. I worked night shift, so I wouldn't eat in the mornings before I went to bed, and would eat healthy once I woke up in the afternoon. Before I knew it, I had dumped 30 pounds. It was motivating. After that though, I had to start really working to get the weight off.
Well, for me, it was start losing weight, or die early and miserably. Not a hard decision. Now that I have some of the weight off, I love running because all I think about during that time is my form, my breathing and my distance and time. Everything else disappears for that 30 or 60 minutes.