By dismantling UFC lightweight champion BJ Penn earlier this year, St-Pierre took ownership of the "best pound-for-pound fighter" mantle. GSP routinely kills it in the gym with strength and conditioning coach Jonathan Chaimberg, a fellow Montreal native. Chaimberg has taken him from only eight body-weight pullups per set to now banging them out with a 120-pound dumbbell attached to his waist. Normally 188 pounds, St-Pierre cuts about 20 pounds for a fight and carries only about 5% body fat. "He's probably the most gifted athlete you'll ever meet," says Chaimberg.