KU Alternate Meal Energy Level Study

The purpose of this study is to provide evidence for the feasibility of an alternative weight control strategy by comparing two diets to see how intermittent calorie restriction compares to continuous or daily calorie restriction for weight loss in 35 adults with overweight or obesity. These diets will be incorporated into a comprehensive and intensive weight management program involving weekly health education meetings, regular diet and physical activity tracking, and feedback from a registered dietitian. Each intervention includes 3 months of weight loss and 3 months of weight maintenance. Group 1: Follow a low-calorie diet every day (1,200 - 1,500 calories daily) Group 2: Follow an intermittent very-low calorie diet (500-800 calories). Participants in this group will alternate between days of 500-800 calories and days of structured eating using healthy eating principles.