New to MFP and inspired!

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Hello all! I'm just starting and after looking at some before and after pics I'm so glad I found this site! I am 5'6" and I weigh 175-180 and I decided that is just too much. Does anyone else have an athletic build? I fell like that has been my only saving grace with carrying all this weight. I don't look so heavy (I wear a 10), and I do a lot of strength training. Any success stories?