The Yo-Yo Effect: Why Weight Loss Can Be Hard to Keep Off

Losing a significant amount of weight is a major accomplishment, but maintaining that loss can be a considerable challenge. Many individuals experience the “yo-yo effect,” a cycle of weight loss followed by weight regain. While some may dismiss this as a lack of willpower, there are complex biological and hormonal factors at play. Experts explain why this happens and what can be done to improve long-term weight management.

Hormonal Disruptions and Hunger

Obesity is often associated with disruptions in hormones that regulate hunger and satiety. Mariëtte Boon, an obesity physician and researcher at the Erasmus MC, explains that when individuals lose weight through significant calorie restriction, these hormones become even more imbalanced. [1] This leads to increased feelings of hunger and a decreased metabolic rate, making it easier to regain weight.

Metabolic Adaptation

Internist-endocrinologist Liesbeth Van Rossum highlights that individuals with a history of obesity need to eat less and exercise more to maintain the same weight compared to those who have never been overweight. [1] The body adapts to previous weight, requiring sustained effort to prevent regain.

Chronic Inflammation in Fatty Tissue

Excess fatty tissue can become chronically mildly inflamed, according to Boon. [1] This inflammation disrupts the production of hormones that signal fullness, leading to increased appetite and a greater propensity to think about food. Maintaining a healthy eating pattern, requires increased self-discipline.

The Importance of Exercise

Exercise plays a crucial role in weight management, particularly for those who have previously been obese. General exercise recommendations for adults include 150 minutes of moderately intensive exercise per week. However, Boon suggests that individuals who have lost weight may need to exercise almost double that amount – between 200 and 300 minutes per week – to maintain a stable weight. [1]

Expert Recognition and Research

Mariëtte Boon has received numerous accolades for her research, including the NWO-Veni grant and the KNAW Young Scientists Award. [1] Her operate focuses on the role of glucocorticoid receptor sensitivity in the development of cardiometabolic diseases and ethnic aspects related to obesity. She co-authored the international bestseller ‘FAT: the secret organ’ with Liesbeth Van Rossum. [1] Recently, they launched “VET Belangrijk 2.0,” incorporating the latest research on obesity. [2]

Further Research and Expertise

Boon’s research has explored pharmacological strategies to enhance brown adipose tissue (BAT) activity and energy expenditure, leading to reductions in obesity. [3] She has published over 70 papers in journals such as Nat Med, Nat Commun, Diabetes, Diabetologia and Cell Metab. [3]

Understanding the complex interplay of hormones, metabolism, and inflammation is crucial for developing effective long-term weight management strategies. Continued research and personalized approaches are essential to help individuals break the cycle of yo-yo dieting and achieve lasting health.