Wally > Hi again Jim. Uhm... could it be that Lance rides because he, like
> me, find it the most enjoyable physical activity there is?

Lol.  You have to *really* enjoy a physical activity to do it at  
extremely high levels of intensity for eight hours a day seven days a  
week.

Reread my original post again.  It's a facinating theory -- and of  
course not mine!  (I believe I got the idea from Taubes).

I love biking too, btw.

Jim