In the latest episode of Explore we hear Mark Beaumont’s audio diary from GBDuro, the on- and off-road race the length of Britain, from Land's End to John o’ Groats. Amazingly this was Mark’s first ever organised race — though GBDuro is not a race in the traditional sense. Or perhaps it is? As well as being a test of endurance, it is an event that seeks to put cycle racing back in touch with its roots. With four ultra long stages, and with the riders unsupported and self sufficient, it arguably has more in common with the early Tours de France than the modern incarnation. As well as Mark — who told us all about his round the world record in our first ever episode of Explore — we hear from some of the other competitors. The Cycling Podcast is supported by Supersapiens and Science in Sport. Supersapiens is a continuous glucose monitoring system that helps you make the right fuelling choices. See supersapiens.com

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