radio host jeff dahler said he was tired of being the funny fat guy. >> i realized that one of the onlyings that any of us can control in our lives is our bodies. what we put in them and how we take care of them. >> down 25 pounds now, jeff says he still has one major problem, which is fitting what he calls his big head into a swim cap. but physically, he is doing great. >> carlos was battling type ii diabetes while also trying to inspire his fourth grade students. >> lucky seven. >> i want to be able to show my students that if you have diabetes or that if someone in your family has diabetes, you don't -- you can break that chain of ever getting it. >> reporter: now he is down 80 pounds, has gotten off almost all his diabetes medications and launched a run club at his school. more than 100 of his students are already taking part. rick morris is a web designer and volunteer firefighter who was also a smoker. >> after my career in the army, i started smoking and quit exercising. i don't want to die young from controllable circumstances. i want to live. >> reporter: he crushed his last ci