Perfect Running Pace Revealed

http://news.yahoo.com/s/livescience/20090329/sc_livescience/perfectrunningpacerevealed

Our scientists at work, or the DUH factor:

So, why is a zoology professor studying running efficiency? Steudel's previous work has tried to build a theory of why our early ancestors evolved from moving on four limbs to two limbs, also known as bipedalism. She has found that human walking is a more efficient method of getting from point A to point B than on all fours.