How does Lance Armstrong do it? Ah, dear reader, it's all in the freakish physiology: "Mr. Armstrong's VO2 max is 85 milliliters of oxygen per kilogram of body weight per minute. An average untrained person has a VO2 max of 45 and with training can get it to 60. 'Lance would be 60 if he was a couch potato and never trained,' Dr. Coyle said. 'For the average person, their ceiling is Lance's basement.'"