Get ready to be inspired. Last flight on "extreme weight loss" we met meredith, 25 years old, a teacher who wanted to lose more than half her body weight. Take a look at her incredible journey. For... See More
Get ready to be inspired. Last flight on "extreme weight loss" we met meredith, 25 years old, a teacher who wanted to lose more than half her body weight. Take a look at her incredible journey. For most of her life 24-year-old meredith had struggled with her weight and identity. I always knew I was adopted. They're small and I'm not. At all. I never felt like I fit into my own family. Reporter: Years of yo-yo dieting have brought her to 314 pounds. So this kindergarten teacher from rochester, new york, reaches out to chris powell who wastes no time getting meredith into boot camp. Oh, my god. Finish what we started. Reporter: She wants to weigh 15 5 po 155 pounds, a goal she tattooed on her stomach. While it isn't easy -- we're going to run from this lifeguard station down to that lifeguard station. Reporter: Meredith meets the challenge head on. Oh, my gosh, meredith. You just dropped 84 pounds. Oh, my god. Reporter: And over the next year -- you lost 32 pounds. You're down another 22. Reporter: So did meredith make it down to 155? Ladies and gentlemen, put your hands together for the all-new meredith! so here it is. The moment we've been waiting for. There she was and here she is now. Meredith and chris powell. Congratulations. Thank you. Thank you. Hi, chris. You have done it again. Congratulations. I want to give you these. I know you wanted to show us. I do. I do. Share with us how far you've come. At the heaviest I was over 400 pounds at one point and here we are today at 155 pounds and it's amazing. Such a journey. Congratulations. Thank you. Chris, host of "extreme weight loss" and "choose more, lose more." You said meredith's journey was especially inspiring. It was. So much so she tattooed her goal on her body. That shows dedication. But it's also one of the most important things we can all do is we need to know where we're going. We need to have that purpose and that's exactly what she did and sure enough, she got there. You got there, and we are so thrilled to see it. Thank you for inspiring us and i also want to share with everybody some very exciting news about you, chris. So why don't you tell us. We have baby number four on the way. Baby number four, yes. chris powell, expanding the family. Thank you very much for inspiring all of us and check out amazing transformations on "extreme weight loss." Tuesdays, 8:00, 7:00 central on abc.
This transcript has been automatically generated and may not be 100% accurate.