IT seems that I meet more fell runners than walkers in the hills these days. The old safety cliches about not going hillwalking without waterproofs, spare hats and mitts, a warm drink and stout boots don’t appear to affect these mountain athletes. Dressed in shorts and t-shirt, perhaps with a miniscule pack or a skimpy lightweight waterproof tied round the waist these guys and gals seem impervious to the cold and wet as they bound down the hillside with little obvious effect on hips and knees. How I envy them. When I was younger I ran a bit in the…