Philadelphia, PA, August 28, 2012 Many people can drop pounds quickly in the early phases of a diet, but studies have found that it is difficult to keep the weight off in the long term. For post-menopausal women, natural declines in energy expenditure could make long-term weight loss even more challenging. A new study finds that in post-menopausal women, some behaviors that are related to weight loss in the short term are not effective or sustainable for the long term. Interventions targeting these behaviors could improve long-term obesity treatment outcomes. The research is published in the September issue of Journal of the Academy of Nutrition and Dietetics.
Lead investigator Bethany Barone Gibbs, PhD, University of Pittsburgh Department of Health and Physical Activity, explains that a number of factors work against long-term weight loss. "Not only does motivation decrease after you start losing weight, there are physiological changes, including a decreased resting metabolic rate. Appetite-related hormones increase. Researchers studying the brain are now finding that you have enhanced rewards and increased motivation to eat when you've lost weight." Combined with the natural energy expenditure decline in women following menopause, it is extremely difficult for older women to lose weight and maintain weight loss.
Traditional behavioral treatments for obesity, focused on caloric intake, have had poor long-term results. The investigators sought to determine if changes in eating behaviors and selected foods were associated with weight loss at six and 48 months in a group of overweight post-menopausal women. A total of 508 women were randomized to either a Lifestyle Change group or a Health Education group. The Lifestyle Change group met regularly with nutritionists, exercise physiologists, and psychologists throughout the study. Their goals were to reduce fats and caloric intake, increase consumption of fruit, vegetables, a
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Elsevier Health Sciences