"> I guess the $64,000 question is why Paleolithic humans were not fat?"
And the $64,000 answer would probably be it was the diet combined
with the lifestyle. Over a weeks time paleo people did tons more physical
work than just about anyone today, even manual laborers. Here's a link
to a forum that has paleo type people discussing ways to exercise
http://pub17.ezboard.com/banimalability
Jim