How One Woman Lost Nearly 300 Pounds and Saved Her Life

Rhonda Martin weighed 457 pounds before she embarked on a two-year weight-loss journey.
2:09 | 12/02/14

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Transcript for How One Woman Lost Nearly 300 Pounds and Saved Her Life
And if you're look forring for ins trags to lose weight, a woman who lost nearly 300 pounds, transforming her body and getting her life back. Abbie Boudreau has our story. Reporter: At 457 pounds, Rhonda martin could barely walk. Even breathing became a chore. She never imagined she could one day look like this. I was just existing. I wasn't -- I had no social interaction with people. Reporter: Desperate to lose weight, she tried countless fad diets, even weight loss pills. But she gained it right back. I knew if I didn't get the weight loss off, there was great risk of me dying soon. Reporter: Fearful for her life, she ditched her old, unhealthy eating habits and started drinking protein shakes. It's only two shakes a day, and the other three meals would be just regular food. So I wasn't limiting myself to the shakes. Reporter: Rhonda says she began counting calories, drinking eight glasses of water a day and using a pe come ter to track her steps. Pushing herself to walk 100 more steps each day. By setting the tiny mini goals, it kept me focused. Reporter: And when walking wasn't enough, she began riding this electric bike. It was amazing for a woman my size to be able to get on a bike and be able to move as freely as I was able to move. Reporter: Tracking her two-year-long weight loss journey with hour 14,000 devoted Facebook followers, she went from 457 pounds to 180. A dramatic 280 pound weight loss. I never thought that would be possible. Reporter: But her journey didn't end there. The spring sprint triathlon. After the race, I signed up for the next one. Reporter: She's completed three half marathons and four sprint triathlons and now training for a full ironman. I am living my life and the way I want to live it. Reporter: For "Good morning America," Abbie Boudreau, ABC

This transcript has been automatically generated and may not be 100% accurate.

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