The prevalence of obesity around the world has tripled over the past 40 years. Along with that rise, dieting and attempts to lose weight also have soared. But, according to research published in the journal ‘iScience’, when it comes to getting healthy and reducing mortality risk, increasing physical activity and improving fitness appear to be superior to achieving weight loss. Researchers say that weight cycling, commonly called yo-yo dieting, is associated with health problems, including muscle loss, fatty liver disease, and diabetes. So, by focusing on fitness rather than weight loss, people can gain the benefits of exercise while avoiding the risks associated with weight cycling.