My right ankle hurts

My right ankle hurts a little today. I sprained it many years ago, back in my high school days. Ever since then, I've never had complete flexibility in this joint.

I think this also makes it difficult for me to maintain my balance during stretching exercise and certain kickboxing moves. I wish things were different, as I'd really like to get better at this sort of thing. Darn it.

So what's the deal? Did the ligaments somehow grow too bulky?