Outside: The Marathoner's Achilles Heel

How to Strengthen Your Ankles and Run Faster 
Alex Hutchinson/Outside Online, Sep 13, 2018

New research zeroes in on an unlikely culprit for why running gets less efficient as you fatigue.

Anyone who has scrolled through their own marathon race photos knows that the keen-eyed high-stepper who shows up in the early photos bears little resemblance to the pathetic hobbler of the final miles. Fatigue changes your running form, and yet the vast majority of biomechanics studies involve a few minutes on a treadmill at a comfortable pace. There are some exceptions (like this recent field study of marathoners at the World Championships), but much of our knowledge about running form assumes that we never get tired...

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