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2026 Runner's World Awards
Training Shoes
2026 Runner's World Awards
Nearly 300 local runners and staff at Runner's World tested more than 100 new models to determine the best 2026 training shoes. The Glycerin Flex was recognized for striking a balance between lightweight construction, plush cushioning, flexible midsole, comfortable fit, and outsole durability.
Flex the rules
Unleash your feet
The FlexZone™, our midfoot flex groove, plus the podular forefoot design provide flexibility and support where you need it.
Expertly tuned cushion
Nitrogen-infused DNA TUNED foam combines large cells in the heel for airy landings and small cells in the forefoot for powerful toe-offs.
Flexible fit
Our soft, breathable flat knit upper stays flexible and moves with your foot.
The Glycerin Flex
The future of running is here, where human movement and tech become one. Introducing the freedom of Glycerin Flex, a new way to experience luxurious cushion, made to move with you. Our years of biomechanical research have shown that not all runners are alike. Now you can choose from even more options in the Glycerin for however you want to experience the run.