Joe Wicks wants to know: What’s the one thing that makes life better? Joe loves finding ways to boost his mental and physical health, so he’s asking some of his inspiring mates about their secret to physical and mental happiness. Whether it’s a high-intensity cycle, a freezing cold shower or a good long dog-walk, every guest will share the one thing that works for them. Runner, super-athlete and author Robin Arzón is perhaps best known as the head trainer at Peloton, the home-exercise-bike company. You might not know that she's run marathons, ultra-marathons, 100 mile races... she's even run through the night in the middle of the desert at Burning Man festival. And you almost certainly won't know how she got into running in the first place. It's a story of strength, grit and amazing triumph over adversity. No wonder she's Joe's 'go-to-girl' when he needs a bit of motivation for his own work-outs! Joe and Robin chat about everything from physical strength to mental resilience, what it takes to run for 29 hours straight, and Robin's most important self-care routine... not a work-out, but getting a full, nine hours of sleep, every night. Summer holiday’s been postponed and you’re feeling down? Forget about it. This is sunshine in a podcast. Joe Wicks is here for you, and he won’t stop until you’re fit and happy. Producer: Emily Knight Editor: Dimitri Houtart A BBC Audio Bristol production for Radio 4