Instead of the Walking Dead, we are the Running Living. The urge to transform can come from within, from a sense of either loss or surfeit in your life. I have known people who ran because they felt there was something missing, and they thought if they could pick up some speed they might find it. I have also known people who’ve found themselves laden like Marley’s ghost, with chains of stress and responsibility and unwanted pounds, who began to run in the hope that all or some of it would shake off from the jostling.