biggest bodybuilder in the world
World's Most Extreme Bodybuilders. From the man with the world's biggest biceps, to the bodybuilder behind the Incredible Hulk, meet some of the most extreme bodybuilders out there. 1 Gregg Valentino: World's Biggest Biceps. Gregg Valentino is one of the most controversial yet popular bodybuilding icons, considered by some as the biggest bodybuilder ever. He started bodybuilding at the age of 13. After over 23 years of training naturally Gregg decided to experiment with steroids.