This combination of images provided by Amanda Daley shows mockups of a soft drink can and a chocolate candy bar with labels for "exercise calories," or the amount of physical activity needed to burn them off. Daley, a professor of behavioral medicine at Loughborough University in the United Kingdom, says, "They may still ignore it, but let's give it a go. Let's at least give them a chance to be able to easily understand." (Amanda Daley / AP)