Captain Caveman

Now we know why the Muscle Shark tested positive for steroids a couple years ago. How else do you get through a workout like this twice a week? This video shows Sean Sherk getting ready for his lightweight matchup with Frankie Edgar at UFC 98 on May 23. Check out the gas mask he wears around the 5:30 mark. Wanderlei Silva does something similar. Oh, and the music’ll make your ears bleed, so I suggest muting it.