A while back when I was a competitive swimmer, my coach made us run a lot. At one point I got a minor injury in my right ankle and I wore a brace while running, eventually it got better, but ever since then, when I start to run I get a painful spasm and I have to stop and wait for the pain to go away, after that I can run fine. There's no swelling that I can see, and only a little bit of tenderness in the area where it locks up. Any idea what this is?