Consistent Conditioning

 Former competitive cross-country runner
 Winning mountain bike racer
Continued to train 1996-2006. I have always been among the fittest, if not the fittest, in every type of racing.

Year 2001 2002 2003 2004 2005
Workout Time (Hours)   427 388 331 260 215

It gets harder to train as I travel more, but it's certainly possible.