'Exploring feels good, it feels meaningful' - author questions with Alex Hutchinson

'It was easy to write … I was waiting to tell this story' - author questions with Rebecca Ajulu-Bushell

'Most of my books, I start off with a plan, then tear it up' - author questions with Richard Askwith

'There is a lot of connection between running and dancing' - author questions with Michael Crawley

'Being accused of doping was the worst thing I've ever been through' - interview with former marathon world record holder Paula Radcliffe

'Ultra running is a rest from writing' - author questions with Damian Hall

'An Olympic medal sets you apart' - interview with Irish running legend John Treacy

'For 65 days I was cruising, then it all went wrong' - Adharanand Finn looks back on his 1,400-mile run around Ireland

'For a woman to set a challenge like this is so powerful' - interview with ultra runner Sophie Power

'I ran in the world champs, then gave it up to start a band' - interview with running punk Jimmy Watkins

From zero to the Olympics in four years - interview with marathon runner Rose Harvey

'It's a fantastic freedom' - interview with BBC newsreader and marathon runner Sophie Raworth

'You need to invest in your own health' - interview with record-breaking ultra runner and movement expert Paul Tierney

'I always try to get back to that flow feeling' - interview with all-conquering British trail runner Jon Albon

'Sometimes I just thank my body' - interview with new British marathon sensation Calli Thackery

'The Kenyans are made of bones and flesh just like me' - interview with Italy's new marathon star Iliass Aouani

Is ultra running bad for you? Interview with leading exercise scientist Nick Tiller

'There's no limit to how far you can push yourself' - interview with Grayson Murphy, the World Mountain Running Champion

'I felt I had the key to infinite power' - tales from a six-day race in France, with Bob Hearn

'I did it ... and I had a horrible time' - tales from the Self-Transcendence 3100