I may've missed an earlier thread mentioning the passing of fitness pioneer & fine runner, Dr Ralph Paffenbarger on July 12. Amby Burfoot talks about Paff @:
http://www.rodale.typepad.com/footloose
.
Paff is the guy who conducted a long-term look at Harvard alumni, comparing those who remained active w/those who didn't- concluding the active stayed healthier longer.