Why it’s hard to keep the pounds off

Rebecca Wright and her husband, Daniel Wright, have gained back a lot of the weight they lost six years ago on Season 8 of "The Biggest Loser." A study of the contestants helps explain why.
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Rebecca Wright and her husband, Daniel Wright, have gained back a lot of the weight they lost six years ago on Season 8 of "The Biggest Loser." A study of the contestants helps explain why.