Coaches Ian Sharman, David Roche and Krissy Moehl join The Nation to debate matters of trail running consequence in a new game called, "Bonk or No Bonk.

More about Krissy Moehl:

• Krissy Coaching services
• Krissy's book, "Running your First Ultra"

Sharman Ultras coaching services

More about David Roche:

• David and Megan's coaching at SWAPRunning (SWAP stands for Some Work, All Play).
• Their book, the Happy Runner