It's an old story, but once again timely thanks to the drug scandal that rocked this year's Tour de France. Not to be confused with the drug scandal that rocked last year's Tour de France. (But that's okay, because it's all cleaned up now. Tipster.)

Amateur cyclist Stuart Stevens takes performance-enhancing drugs for six months in order to see what they do. Read the first-hand account of the effects of human growth hormone, EPO, and steroids.