The Essay Running the World 3. Hayden Lorimer runs for his hobby. His day job is a geographer. His feet register the rocks he runs over as intently as any geologist might survey them. Producer: Tim Dee Written Trail THE ESSAY RUNNING THE WORLD 19th April - 23rd April 'Running the World', the Essay series this week is written and presented by the running enthusiast and geographer Hayden Lorimer. Walking, swimming, rock climbing - many outdoor activities that put us out of breath have long cultural associations. Running is surprisingly little represented in the arts. Why should that be? The five talks evoke five runs and explore key cultural representations of running: Alf Tupper, the comic strip runner, Alan Sillitoe's novel 'The Loneliness of the Long Distance Runner', the self help running programmes of present day America They also do things that runners don't - stop and look around and think what it means to experience the world by running across it. Specific trail for priogramme three. As well as a runner Hayden Lorimer is a geographer. His essay today explores whether knowing the sorts of rocks you are running over makes it harder or easier to run.