Let's put to bed the speculation on Lance Armstrong's running potential, and let Lance Armstrong answer the question himself.
In an interview for UK Times Online by Alastair Campbell, printed Saturday Feb 28, 2004, Campbell said, "In any event, beyond winning another Tour, Armstrong has one more sporting ambition he has to fulfil. He wants to run a sub-five minute mile." Quoting Armstrong, "I'd hurt for a week after but I'd love to see if I could do that. Four laps, 75 seconds a lap, wouldn't that be something?"
End of story.