The unique psychology of extreme endurance athletes BBC REEL

What is the appeal of extreme endurance sport and why do people do it? With expert insight from sports psychologists, we look at the physical and psychological effects of why people push themselves to the limits of human capability. Video by Sam Padget Commissioning Editor: Griesham Taan With thanks to St Mary's University London, Kings Swimmers & Borja Mucientes - - - - - Subscribe to BBC Reel: More videos: #bbc #bbcreel #bbcnews #sports #health #psychology