Neuroscientists have studied treadmill runners, ultramarathon athletes and a number of lab animals to investigate the effects of running on grey matter. It may seem obvious – as you push on through a long run, veering wildly between sensations of agony and elation – that running can have a huge effect on your state of mind. It is an intuitive idea that a growing number of neuroscientists have begun to take seriously, and in recent years they have started to show us what actually plays out on the hills and valleys of your grey matter as you run…
