Why do people opt to test themselves? Why do everyday men and women run marathons or participate in Tough Mudder or Iron Man competitions around the world? The general public is never in awe at the winner of a marathon, but is always wowed by their friend (a common man) finishing said marathon. The reasoning for that rush of emotion is simple. We know the mammoth journey that was undertaken before the runner steps on the starting line, we have sat through hours of training, doubt, blood, sweat and tears, and most of all we empathise because the runner is one of our own. Beyond the blisters, ch....