On this week's episode of the Runner's World podcast, we speak with author and 2:20 marathoner Michael Crawley about his new book, To the Limit, which explores what endurance means in cultures around the world. Listen to Crawley talk about the importance of playfulness, running to feel and the lessons he learned running with everyone from the Raramuri in the Copper Canyons of Mexico to ultrarunners in the UK.

Pick up a copy of To the Limit at Waterstones, Amazon or any good bookshop:

waterstones.com/book/to-the-limit

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