More than one-third – 34.9 percent or 78.6 million – of adults in the country are obese, according to the Journal of American Medicine, and there is no indication of the trend changing. Obesity is a chronic disease and a complex disorder characterized by having too much body fat. The long-held 80:20 ratio suggests that for successful weight loss, 80 percent of the results are based on what you eat and 20 percent from your physical activity, Lisa Mikus, RD, CNSC, CDN, says. “Our bodies are so dynamic and perform such complicated metabolic processes that it’s hard to reduce such a highly argued topic like weight loss down to a simple ratio,” she adds. “Yet, I do believe that nutrition is more crucial to weight loss than physical activity, especially initially, but physical activity can supplement a foundation of healthy eating with the goal of healthy weight loss.