Running is more popular than ever. Last year, in the UK alone, 240.7 million runs were recorded on activity tracking app Strava – up a staggering 46.2 per cent from the previous year. The sport is so popular because it is so accessible: unlike other equipment and kit-laden activities, runners need a pair of trainers (some even forego those) and little else. In its simplest form, there are no memberships to pay or spaces to book; all worries can be left at the door.