What I read was that at 5' 10" he has the heart of a 6' 6" man. Not near twice the size of a normal human. And, that there are 1,000 people between the ages of 15 and 20 in the US alone with "the same physilogical potential".
It also said that that "Armstrong, 33, trains 365 days per year, 450 miles per week and his six and seven hour training rides add up to more time on the bike than any of his challengers."
The heart is a muscle... as sparky was saying, all of that training will have an effect.
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Hey buddy... can you spare a sig?
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