Much as DNA testing has improved over the years and thus helps solve crimes from the past so can be said of drug testing. That said Armstrong was one of the best physical specimens during his time at the top. Even if all were doping he still was the winner amongst the users and wannabees. Apparently his lung and heart capacity was much superior to his competitiors.
I agree 100% they tested his lung capacity on a Discovery Channel show and it was off the charts..he is w/o a doubt the best cyclist in our lifetimes and maybe never be beat.
One way to look at it is that he showed the greatest response to EPO -- the highest sensitivity. This is different from having the greatest natural ability. But, yes, his heart is unusually large.
“Apparently his lung and heart capacity was much superior to his competitiors.”
Not so much. http://www.topendsports.com/testing/records/vo2max.htm