California-born Nat Young is not your average laid back surfer. At the age of 24 and ranked seventh in the World Surfing League, the pro athlete works out five days a week, combining three to four hours of surfing with in-gym sessions led by Nike Trainer Joey Wolfe. Here's a look at what he does to stay in shape and how training outside of the water helps him become a stronger surfer within it. (h/t Airows)