Duh.

A new study debunks the widely held belief that diet plus exercise is the most effective way to lose weight. Researchers report that dieting alone is just as effective as dieting plus exercise. For weight loss to occur, an individual needs to maintain a difference between the number of calories they consume everyday and the number of calories they burn through metabolism and physical activity," Dr. Leanne Redman of the Pennington Biomedical Research Center in Baton Rouge, Louisiana, explains in a press release.

Well, I'd say alert the media, but they did. How is this news?