"Amazing Race" host Phil Keoghan, left, sizes up surfer Laird Hamilton by standing back-to-back with him.
Laird Hamilton, right, warms up with Phil Keoghan by running on the beach across sharp shells and jagged rocks. Hamilton believes in shocking your body, as Arnold Schwarzenegger preached.
Laird Hamilton, left, and Phil Keoghan practice paddle surfing on shore. Keoghan was in disbelief about riding his first wave with a surfing legend.
Laird Hamilton carries his surfboard as he prepares to head into the water.
Phil Keoghan successfully catches his first wave with his coach, Laird Hamilton, right behind him.
Phil Keoghan and Laird Hamilton surf on the shores of Malibu, Calif.
Laird Hamilton drags a railroad tie through the sand. He performs this workout 15 to 20 times a day.
Phil Keoghan struggles as he pulls a railroad tie uphill.
Surf legend Laird Hamilton climbs up a rope. "The whole world is Laird's gym," "Amazing Race host Phil Koeghan said, "and anything can be a workout."
Laird Hamilton, left, discusses his risk-taking lifestyle with Phil Keoghan.
Phil Keoghan, left, and Laird Hamilton go for a bike ride. Hamilton prefers to attach a 40-pound weight to his wheels for an added challenge.
Laird Hamilton takes time out from his bike ride to talk about the importance of maintaining an active lifestyle.
Laird Hamilton and Phil Keoghan ride uphill with one of Hamilton's exercise friends, a 74-year-old man. Hamilton believes that age should not be a factor in taking risks.
Laird Hamilton, right, and Phil Keoghan ride skateboards through a parking lot. Skateboarding is another one of the many extreme sports that Hamilton enjoys.
Surfer Laird Hamilton attributes the fact that there are so many unhappy people around the world to a lack of "living."
A view of Phil Keoghan from the water while he masters the art of paddle surfing.