12/03/2026
What does the Brooks Glycerin Flex feel like to run in?
The forefoot of the Glycerin Flex is, as the name suggests, very flexible. Its actually quite stable when you land, due to the large piece of midsole on the inside of the heel that is one continuous piece, but once you get up onto the ball of the foot for propulsion, the flex grooves in the midsole allow you to move onto your forefoot quite easily.
I've found this makes a great shoe for short up tempo sessions, and hill repeats, where you are getting up onto the ball of your foot quickly.