Kim Jong Kook revealed what caused one of his previous breakups on the May 25th episode of KBS' 'Hurry Up Show'.

 

Kim Jong Kook appeared on the show alongside his friends singer Hong Kyung Min and actor Cha Tae Hyun, and the three discovered their personal lives and thoughts on marriage. The 'Running Man' cast member stated, "I lied to my girlfriend about exercising, she caught me red-handed, and we broke up."

Fans and viewers of 'Running Man' are already aware of how exercise-focused Kim Jong Kook is, but it seems he's way more into fitness than expected!