On today's broadcast of SBS' "Running Man," singer Kim Jong Kook revealed the highly-coveted diet which resulted in his fit body. On the show, the participants were given the mission to gain a combined 1kg with their teammates by consuming sampler foods at a supermarket. Kim Jong Kook paired up with Haha and Gary, thus forming the group nicknamed 'Kim Jong Kook and the kids.' As the group went around each sample table, they ate a variety of items including black bean noodles, Korean bacon, and fried foods. Yet Kim Jong Kook adamantly refused to eat any of the fried foods and Korean bacon. Knowing that the team needed to gain weight together, however, he force-fed his teammates to eat his portions. When they came to the last sample stop, Kim Jong Kook took one look at the black bean noodles and flatly said, "I can never eat this!" So there you have it, folks. If you want to have a body like Kim Jong Kook, be a health nut - but we know that he secretly wanted to taste it! Source + Photo: Yahoo! Korea