You took the words out of my mouth. A lot of Sumo wrestlers are not natural. I don't know what they take, but i am sure its whatever they can. Second, you are making a big deal about being a natural O. Listen, yes, steroids may not be the healthiest choice but if you want to be an Olympia competitor, its necessary. Even if you could get to be the size naturally going the sumo route, one, as alex said in the beginning, roids would be 100% necessary to get into contest shape. Second, you would be a lot healthier taking steroids than you would be ballooning up to 400-600 pounds with that much bodyfat. It would take several years to get up to that, so during that time period, you would be putting all organs, bones, skin, under enormous stress, your bloodpressure and chloresterol would skyrocket. Sure, steroids, especially if abused like a lot of guys do, will cause all those sides, but amazingly, to a lesser extent.