I ripped tendons in both ankles first time when in high school football. 2nd time freak twist off a curb. The 1st one never healed and would twist over with aweful pain by something as a small indent in the ground. Up until my late 30's. It was not until I started wearing ankle support high top type day hikers all winter and Asolo 520's when hiking did it heal. I haven't set it off since. And had many twists on loose rocks while hiking and the Asolo's. saved me each time. I'll never wear low non ankle supports for most of my long hiks. Short easy ones I can get by with low cut day hikers.