I'd like , please http://fittor.fun/bfseex/ xxxxxxxxxxxxxbg The continued demand to run the legendary 26.2-miler reflects a mind-over-matter appeal, says Ryan Lamppa, media director for the nonprofit Running USA. "The human body is designed to go 20 miles," he says, explaining that the body stores enough glycogen, or energy, to run that far if you pace yourself accordingly. The extra 6.2 miles is more metaphysics than physics, more will than power. As Lamppa explains, it tests physical limitations: "That's the beauty and the horror of the marathon, that it has that sense of, 'Am I going too fast? Could I blow up? Am I gonna hit the wall?' And there's something about overcoming that."