New Weapon in the Battle of the Bulge

ABC's Linsey Davis shows you how to lose weight and keep it off.
2:12 | 10/13/11

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Transcript for New Weapon in the Battle of the Bulge
And are healthy living report tonight we have new secrets and that tough challenge faced by millions not just taking laid off but keeping it off. With two thirds of American adults are overweight or obese. Female what works is more important than ever and now one of the biggest studies ever has analyzed 101000 success stories and cracked the code. Here's ABC's Lindsay Davis. Dying in -- knows how hard it can be to lose weight if you eat meat and potatoes basically before. And keep it -- one estimate 95%. Of all the writers in the way that. Diane I've lost fifty pounds. And -- capped off a fifty pound four years ago she decided to adopt a new strategy in the battle of the bulge. I wrote down -- calories of fat -- carbohydrates. Scientists at Brown University say her battle plan works. And they have the data to prove it. An army of more than 101000 people not only lost significant amounts of weight. But managed to keep it off for years these individuals have tried previously to lose weight. Unsuccessfully. This time they say they will more committed. To the behavior changed at the start participants weighed in at an average of 224. Pounds. They lost on average 69 pounds but here's the amazing thing. After ten years participants were on average still 51 pounds lighter. Researchers say they kept the pounds off by doing things like counting calories and fat -- writing down and tallying everything they -- Not skipping breakfast. Eating similar foods each day and stepping on that scale at least once a week. The key to long term maintenance of weight loss is long term maintenance of behavior change because of nickel back to your old eating and exercise behaviors in clinical -- year old wait. Now what may have tipped the scales most drastically is that the participants involved -- it just look at weight loss is going on diet. But as a lifestyle change and for those who need a specific goal they say -- to reduce your daily intake George. By 500 councils and that is -- -- -- thanks very much.

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

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