Brooks Glycerin 23 vs Glycerin Flex: OUR 100% HONEST Comparison

Brooks Glycerin 23 vs Brooks Glycerin Flex — which daily trainer should you buy in 2026? We put both shoes through their paces to break down the key differences so you can make the right call. The Glycerin 23 is the trusted, reliable daily trainer with DNA Tuned foam, a plush upper, and a smooth heel-to-toe transition. The Glycerin Flex is Brooks' bold new direction — lighter, more flexible, and built with a unique midfoot groove designed to mimic your foot's natural movement. But does flexibility actually work in a max-cushion era? Timestamped Chapters: 0:00 - Intro 0:35 - Glycerin 23 1:11 - Glycerin Flex 1:52 - Comparing Specs 2:16 - A flexible shoe? 4:05 - Rating Each Shoe 5:25 - Why make the Flex? 6:37 - Last thoughts In this review we cover: Midsole foam comparison (DNA Tuned) Weight difference and ride feel Who should choose the Glycerin Flex vs Glycerin 23 Comfort, fit and toe box differences Value and durability of both shoes Final scores: Glycerin 23 (8.9) vs Glycerin Flex (8.6) Whether you're a neutral runner, a heavier runner, or someone dealing with overpronation, this comparison will help you find the right Brooks shoe for your training. Subscribe for weekly running shoe reviews, training tips, and marathon guides. More at marathonhandbook.com 🔴 Subscribe to get all our training tips, running guides and gear reviews : https://www.youtube.com/@marathonhandbook?sub_confirmation=1 🔴 Watch our shoe review playlist: https://www.youtube.com/playlist?list=PLb3iPx8Lcl9l-_FLwIk8k20vF-SELCa32 Reviewer: Alex Cyr IG: https://www.instagram.com/cyresy_10/ Strava: https://www.strava.com/athletes/19798722 Check out our other recent shoe reviews: ASICS Metaspeed Sky Tokyo vs Edge Tokyo https://youtu.be/fFXeE3-gvQg ASICS Megablast vs Sonicblast https://youtu.be/jo_4AM_O49E HOKA Rocket X3 https://youtu.be/AQZI9a8aUbU Over 275,000 runners read our newsletter. Sign up here and get our free book The 26 Golden Rules Of Running: https://marathonhandbook.com/newsletter/ Listen and subscribe to our Podcast here: Apple Podcasts: https://podcasts.apple.com/ca/podcast/the-marathon-handbook-podcast/id1687070922 Spotify: https://open.spotify.com/episode/40fbGjW1uLpDFnzsDfFXYn?si=6b44ece05be643fb YouTube Music: https://music.youtube.com/playlist?list=PLb3iPx8Lcl9n2WSDyO4K0i5yfz93H8BZk&si=lx248VvhqYFir0rq Follow us on IG: https://instagram.com/marathon.handbook Follow us on Tikok: https://www.tiktok.com/@marathon.handbook Like us on FB: https://facebook.com/marathonhandbook Follow us on X: https://x.com/MarathonHB Marathon Handbook was founded in 2016, with the mission from day one of helping you to run far, set goals and meet them. We provide free and super popular coach-vetted training plans for just about every distance and ability level, from your first 5K to a sub-3 hour marathon, to a 100-miler training plan. We've got you covered. We also follow the latest news and storylines in the running world, and review all the best shoes, running watches and gear on our site and our Youtube channel. At our heart, we are runners and athletes ourselves – every person on our team is a running coach, distance runner, or certified health and fitness trainer. #BrooksRunning #GlycerinFlex #Glycerin23 #RunningShoes2026 #BrooksGlycerin #DailyTrainer #RunningShoeReview #MarathonHandbook #BestRunningShoes #ShoeComparison #NeutralRunningShoes #MaxCushion #RunningGear #MarathonTraining #RunnersOfYouTube