View all show notes and timestamps on the KoopCast website. Episode overview: Frederic Sabater Pastor is a CTS ultrarunning coach with a PH.D. in Exercise Physiology and experiences coaching athletes for a variety of challenges. He is also a Postdoctoral researcher at the Inter-university Lab of Human Movement. His areas of focus are  running, trail, performance, physiology, and fatigue. Episode highlights: (32:02) Training differences: road runners 20 hrs/week, trail runners 10 hrs/week, road runners cross train and strength train more, overall road volume is double despite race duration being up to 10x less (37:11) Why are trail runners stronger: do runners self-select, is trail running innately better strength training, strength training is a broad term (51:38) Specificity of running economy: train for specificity, changing protocols from road training, strides over technical terrain, differences in strength training Additional resources: Fred’s paper Trail Runner Magazine’s coverage of this paper Fred’s CTS Coach Bio Fred’s Researchgate profile SUBSCRIBE to Research Essentials for Ultrarunning Buy Training Essentials for Ultrarunning on Amazon or Audible Information on coaching- www.trainright.com Koop’s Social Media Twitter/Instagram- @jasonkoop