Why do my Achilles tendons hurt terribly when I run up steep outdoor hills?
1. Introduction The severe pain in your Achilles tendons when running up steep hills is the result of extreme mechanical stress placed on the tendon fibers during uphill propulsion. Running on an incline forces the ankle into a sharply upward-flexed position before the foot pushes off. This deep angle significantly stretches the Achilles tendon under … Read more