The Steroid Olympics ive often talked about this with friends, and the outcome has always been the same. A 'perfect' athlete, would be highly trained, given a cocktail of drugs from a young age, perfect diet etc. BUT it is my opinion they would be extremely injury prone. Human bodies arent made to travel 15+metres a second for example, which is why we will never see 100m run in 8seconds, without some kind of mechanical aid, that increases stride length. I think we have passed what is naturally possible, and close to what is possible with chemical enhancement.