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She says that was a wakeup call. >> it was the first time i felt that like this body was preventing me from doing something. and i didn't like that feeling. >> reporter: determined to get in shape, moore joined our fit nation team back in january, ready to you're starting this incredible journey. dark moments? are you worried, concerned about? >> i'm not. i feel so positive and hopeful, honestly i think, like coming here has helped me realize that it's not some big dark unknown. it's a lot of little logical steps that add up to make big change. >> reporter: since that day -- ♪ [upbeat music]...

Body and i'm not ashamed of my weight. >> but it was her first experience with swing dancing which left her out of breath after just one song. she said that was a wake-up call. >> it was the first time that i felt like this body was preventing me from doing something and i didn't like that feeling. >> determined to get in shape, moore joined our fit nation team back in january, ready to make a permanent change. >> you're here this is new. meet your teammates. you're starting this incredible journey. dark moments at all? do you worry, are you concerned? >> i'm not. i feel so positive and hopefu...