The Workout that Sets PR’s | Marathon Prep - E4

Thank you to Runna for sponsoring this series and providing my training program. Try Runna for FREE for two weeks: https://tr.ee/icWqec2daq In this video, I run a 19-mile marathon workout in prep for the Berlin and Chicago Marathons. Hope you enjoy! Welcome to the 2:39 marathon prep series! On October 12, 2025 I'll be running my 14th marathon at the Chicago Marathon and aiming to run a new personal best of 2 hours an...