Twilight star Taylor Lautner has been into fitness and working out for some quiet some time. Lautner is a martial artist and was ranked number one in his category by the American Sports Karate Association as a child. Seeing that Lautner has to be topless in front of the camera for Twilight, he put on muscle through by weight training with resistance bands and lifting heavier weight than he normally would with a spotter. And get this, he cut down on cardio, to make sure he didn't loose any muscle mass. Sounds like lots of hard work, determination and a gym partner is needed to get Lautner's body.