"It is a sport which demands an irreproachable lifestyle, a sport which demands a rigor, " Riner says.

CNN: Giant judo champion: Celine Dion puts me in the zone

"You need to be strong up here, " Riner adds, tapping his head.

CNN: Giant judo champion: Celine Dion puts me in the zone

Like any athlete operating at the elite level of their chosen sport, Riner adheres to a strict training program that requires unwavering discipline and a robust frame of mind.

CNN: Giant judo champion: Celine Dion puts me in the zone

While an array of medals and championship-winning performances suggest Riner has mastered both the mental and muscular side of his sport, he is quick to point out that his path to the top was far from smooth.

CNN: Giant judo champion: Celine Dion puts me in the zone