I've been tweaking my ankle (esp on trails with leaves) by unexpectedly
coming down on a root or rock and having my foot jammed upward. My
ankle does not roll to the side, but it does feel like a sprain. It
hurts bad enough that I roll around on the ground for a few seconds.
Fortunately, the pain subsides quickly - I can walk it off and resume
running within a couple of minutes.
For me, it only happens on my left foot (probably because I did it once
and now that ankle is weaker). Also, it generally only happens on a
mild upslopes. I can prevent it by running on the ball of my foot, but
this gets tiring. In fact, if I'm somewhat tired, I'll notice that I'm
toe-striking with my left foot and heel-striking with my right foot. I
suspect this is not a good thing to do.
I've looked around, but I've been unable to find any information about
this type of injury. The only ankle sprains I've seen discussed are
ones where the ankle rolls to the side. Anyone else experience this or
know something about it? Would a certain type of shoe help prevent it?
How about an exercise I can do that will strengthen that area to help
prevent it?