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June 12, 2007 — Factors associated with weight regain after substantial weight loss are identified in a study in which data from the 1999 - 2002 National Health and Nutrition Examination Survey (NHANES) were analyzed. The study is published online June 5 and will appear in the July print issue of the American Journal of Preventive Medicine.

"The finding that nearly 6 in 10 adults who had experienced substantial weight loss maintained their weight within 5% in the past year is encouraging," lead author Edward C. Weiss, MD, MPH, a medical epidemiologist at the National Center for Chronic Disease Prevention and Health Promotion at the Centers for Disease Control and Prevention in Atlanta, Georgia, told Medscape. "Weight loss as little as 10% in an overweight or obese individual can reduce risk factors for diabetes and cardiovascular disease. To be successful at reducing these risk factors in the long term, weight loss must be maintained."

"Those who were sedentary or not meeting physical activity recommendations and those who reported greater daily screen time, such as TV, video, or computer use, had higher odds of weight regain," Dr. Weiss said. "Regular physical activity has been consistently associated with long-term weight loss maintenance; however, weight regulation depends both upon caloric intake as well caloric expenditure. Balancing caloric intake with activity level works on energy balance from both sides, what is taken in, as well as how much is used; in addition, eating a healthy diet and being physically active can reduce the risk of chronic diseases, such as heart disease or diabetes."

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