Diets work, but what good are they if the weight returns? Statistics show that 80 to 90 percent of dieters regain every lost pound. This fact represents the largest and least addressed problem in obesity management. The recidivism of dieters fuels a $30 billion weight-loss industry, an industry that would shrink like Al Roker's waistline if the newly-thin could only make weight loss stick. But here is the problem: The skills needed to maintain a new, smaller body size are not obvious or...