Running Man

This week, the members' willpower gets put to the test. In the Tenacious Dieters to Keep Weight Off Race, they need to beat the scale throughout the day as they take on missions to keep the weight off and maintain their initial weigh-in as a group. If they go over one kilogram, they risk coming in an hour earlier for the shoot. They get four weigh-in chances, and each failure adds an hour to the penalty. Who will keep their appetite in check?