Thank you to Runna for providing my training program! Try Runna for FREE for two weeks: https://web.runna.com/redeem?code=JMILLER In this video, I attempt to run a 2:39 marathon as I take on the 2025 Chicago Marathon! Welcome to the 2:39 marathon prep series! On October 12, 2025 I'll be running my 15th marathon at the Chicago Marathon and aiming to run a new personal best of 2 hours and 39 minutes. In this series, I'm going to give you an inside look at my training block. From my training plan, my diet, speed workouts, strength training, training gear, how to fuel for running, and so much more. 💸 Discounts and Deals on Running Products: https://linktr.ee/jeremy.miller ⚡️ My electrolytes https://bit.ly/47Kyiyc 🫐 $10 off 2Before https://2before.com?sca_ref=3530967.1YZdFFfnuW 🥩 Get 15% off Frank’s Butcher Shop (JMILLER) https://franksbutchershop.com/ Follow Me Strava: https://www.strava.com/athletes/49516157 Instagram: https://www.instagram.com/jeremymille.r/ Tiktok: https://www.tiktok.com/@jeremymillerfit Website: https://www.jeremymiller.io