Shawn Bearden is the host of the very successful 'Science Of Ultra' podcast. He is a full professor of Physiology at the Idaho State University and has a particular interest in running economy, bioenergetics and physiology thresholds.  Today we step in another direction and talk about the mental side of endurance running. Topics we cover are: What are the key differences between marathons and ultras? Which common traits leads runners to thrive in ultras? How can someone build on their psychological limits? How do we know when to push on & when to back off? Here are all the links for Science of Ultra: Website: https://www.scienceofultra.com/ Twitter: https://twitter.com/ScienceOfUltra Youtube: https://www.youtube.com/channel/UCGTYwCx8S1-sWBm5qK4eFUw Podcast: https://podcasts.apple.com/us/podcast/science-ultra-ultra-marathon-trail-running-expertise/id1042673386?ls=1&mt=2 To follow the podcast joint the facebook group Becoming a smarter runner click on the link:  https://www.facebook.com/groups/833137020455347/?ref=group_header To find Brodie on instagram head to: https://www.instagram.com/brodie.sharpe/ To work with Brodie Sharpe at The Running Breakthrough Clinic visit: https://breakthroughrunning.physio/