After 28 days of rest, Jee Seok Jin is back to join the cast! He receives a warm welcome and a surprise health checkup with all members. Healthy rewards can be theirs, even gold, if they fulfill the health standards that will light up the five smiley faces at the Running Health Center. Will they pass the health checkup and keep their stress levels low and heart rates normal to win the prizes? (thetvdb.com)