“The best diet, to make it very simple, is to shop the outside aisles in supermarkets,” said Dr. Joel Lavine, chief of gastroenterology at Morgan Stanley Children’s Hospital.

“There used to be this whole notion of no pain, no gain,” says study co-author Keith Diaz, an assistant professor of behavioral medicine at Columbia University Irving Medical Center.

The common routine of sitting at work all day, then plopping down on the couch all evening horrify experts like Keith Diaz, an assistant professor of behavioral medicine at Columbia University.