Lee Ji Hoon ran with his parents on his back for the first time in preparation of the running competition with a wife on back.
On SBS 'World Challenge - Here We Go," aired on November 4, 2013, Lee Ji Hoon practiced for the running competition, running the playground in front of his apartment with his parents on his back.
Lee Ji Hoon's father said, smiling, "I've had the luck to get on my son's back becaues of the running competition."
On the other hand, Park Hyo Joon and Lee Jong Soo went to Myong Dong and offered free piggyback rides to people.