The notion that moving more will translate to weight loss is a dangerous one. For individuals, it may effectively discourage exercise when results aren't seen on scales. For the media and entertainment industries, it often leads to the perpetuation of the "people-with-obesity-are-just-lazy" stereotype. For the food industry, it allows an embrace of exercise by means of sponsorship and marketing, which, in turn, helps companies deflect product blame and forestall industry-unfriendly legislation. And for public policy makers, it makes it challenging to make the case for interventions that increase exercise, as inevitably the outcome hoped for is weight loss, and when...