. >> denise castelli wants to take back her life by force, swimming, biking, running, even making annce on a u.s. open court. radio host jeff dauler said he was tired of being the fat, funny guy. >> i realized one of the only thing that any of us can control in our lives is our bodies, what we put in them, how we take care of them. >> reporter: down 25 pounds now, jeff says he still has one major problem, fitting his big head, he says, into a swim cap. but he is doing great. carlos solis is among them. >> i want to be able to -- to show my students that if you have diabetes, or that if somebody in your family has diabetes, you can break that chain of ever getting it. >> reporter: now he is down 80 pounds and is off almost all of his diabetes medications, and launched a run club at his school. more than 100 students are taking part. rick morris is a web designer. >> after my career in the army, i started to smoke, i quit exercising. i don't want to die young from controllable circumstances. i want to live. >> reporter: he crushed his last cigarette on our show in february, and he has