'I have this thought sometimes: I could go faster, I could hurt more. So then I try to hurt more' - interview with ultra runner Zach Miller

Zach Miller is one of the world's best and most exciting ultra runners with a string of impressive victories, but he is most loved for his all-out, no-holds-barred style of running, setting off in ultra marathons like they're 5K burn-ups, sometimes winning, and sometimes failing. Zach tells us about his ultra running breakthrough while working on a cruise ship, living for 5 years off-grid halfway up a mountain, and the appeal of pushing yourself into oblivion... Produced @IAmTheHow Music Starfrosch