Core Viewpoint - Weight rebound after dieting is not merely a failure of willpower but a complex interplay of physiological, behavioral, environmental, and psychological factors [2][3][4][5][6] Physiological Factors - Metabolic adaptation leads to a decrease in basal metabolic rate post-weight loss, causing the body to enter an "energy-saving mode," making it easier to gain weight back when returning to previous eating habits [3] - Hormonal imbalances occur, with leptin levels dropping by 30%-50% and ghrelin levels rising, which can trigger feelings of hunger even after eating [3] - Fat cells retain a "memory" of previous obesity, leading to rapid weight gain when high-calorie diets are resumed, often resulting in a higher fat percentage than before [3] Behavioral Factors - Short-term dieting habits are difficult to maintain long-term, leading to a return to old eating patterns when life becomes busy or stress increases [4] - Emotional eating can resurface, where food becomes a source of comfort during stressful times, leading to uncontrolled calorie intake [4] Environmental Factors - The modern nutritional environment is filled with temptations, such as high-calorie snacks and fast food, which are easily accessible and designed to be appealing [5] - Social situations often lead to increased calorie intake, with studies showing that people consume over 40% more calories in social settings compared to eating alone [5] Psychological Factors - A "task completion" mindset can lead to binge eating after reaching weight loss goals, as individuals may feel liberated from dietary restrictions [6] - "All-or-nothing" thinking can cause individuals to abandon their diet after a minor slip-up, leading to a complete loss of healthy eating habits [6] Strategies to Prevent Rebound - A systematic approach involving dietary, exercise, environmental, and psychological adjustments is necessary to maintain weight loss [7][8] - Gradual caloric transition post-weight loss is recommended, along with a focus on high-protein and whole grain foods to enhance satiety and reduce muscle loss [9] - Incorporating strength training and aerobic exercises can help maintain metabolic rate and muscle mass [10] - Modifying the home environment to reduce access to high-calorie foods and managing social eating situations can support weight maintenance [11] - Cognitive restructuring techniques can help set new goals and establish support systems to maintain motivation and prevent rebound [12]