Then on a message forum someone suggested I try orthotics. The issue, they said, is my achilles was bending laterally as I ran because my ankles turn in. Orthotics would restore them to the neutral position — mostly straight.
One of my ankles turns out, not in. It was causing hip pain and back issues when I hiked more than four miles. I’m now more mindful of turning in during the beginning of a trail hike, but after a couple hours I can get distracted and suffer the consequences. Definitely will check out that option. Helpful tip!