Kim Jong-kook
On August 27, 2010, Kim received a lumbar microdiscectomy surgery to relieve a herniated disk. Kim's management company, 101 Entertainment stated, “Kim Jong-kook carried on with his daily activities without knowing that he had a ruptured disk. However, he did feel pain, but did not think much of it, and he endured his condition with painkillers while filming SBS Running Man."