The Science of Weight Loss The Complete Guide to Healthy, Sustainable Weight Loss
Introduction If losing weight were simply a matter of eating less and moving more, most diets would work. But they don't. Millions of people successfully lose weight every year, only to regain much or all of it later. Others carefully count calories, exercise consistently, and still struggle to make progress. So what makes healthy weight loss so difficult? The answer is not a lack of motivation. Nor is it simply a lack of discipline. The answer lies in how the human body regulates body weight. For decades, weight loss was often reduced to a simple equation: Eat less. Move more. While energy balance remains the biological foundation of weight loss, modern obesity research has revealed that the story is far more complex. Today, obesity is recognized as a chronic, multifactorial disease , influenced by genetics, hormones, metabolism, appetite regulation, sleep , stress, physical activity, nutrition, and the environment. In other words, body weight is not controlled by a si...