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Holiday Weight Gain a Big Fat Lie

The Truth About Fat
WebMD Feature

Weight gain during the holidays is a fat, ugly myth. Very few people really gain as much as five pounds between Thanksgiving and New Year's.

The weight gain comes after the holidays, when people don't drop that one little pound.

A study of 195 adults showed that -- from late September to early March -- the majority put on 1.06 pounds in six months' time. A year after the study began, 165 of the participants were weighed again. On average, they were each up about 1.36 pounds from their initial weights.

People who were overweight or obese to begin with were more likely to gain five pounds or more during the initial six-month season, according to the study, which appeared in a March 2000 issue of The New England Journal of Medicine.

"This is a good news/bad news story," study author Jack A. Yanovski, MD, head of Growth and Obesity at the National Institutes of Health, told WebMD in a previous interview.

"The good news is that most people are not gaining five or six pounds during the holidays, but the bad news is that weight gained over the winter holidays isn't lost during the rest of the year," he said.

Those small weight gains add up over the years, causing major medical problems, he said. More than half of Americans are overweight, and excess weight sets the stage for heart disease, diabetes, and certain types of cancer.

It's true -- "fat gain really does require overeating over many days and weeks and months," says Cynthia Sass, RD, nutritionist with BayCare Health System in Clearwater, Fla., and spokeswoman for the American Dietetic Association.

In fact, people who try to under-eat before the holidays are just losing water and carbohydrates stored in muscles -- all of which will naturally stabilize over time.

It's the time spent exercising -- or getting some physical activity -- that really determines who gains more than one pound. Overweight people naturally have a harder time being physically active, since hefting a big body takes more effort. Therefore, the already-obese will likely be those tipping the scales too far.

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