Kim Jong Guk was a member of South Korean pop duo 'Turbo' until they disbanded in 2001. He then started a successful career as a ballad singer and entertainer, releasing 8 solo albums and winning numerous awards, including three Daesang Awards in 2005.
Jong Guk began his military service in March 2006 and was eventually discharged in May 2008. As of July 2010, Kim Jong Guk is a permanent member of the popular variety show 'Running Man'. Because of his muscular body and portrayal of intelligence, he earned himself the nicknames 'SpartaKook', 'Tiger' and 'The Commander' throughout the show. Jong Guk is also a health instructor and owner of a health club.