In my gym class every day before we play a sport we walk around the gym a few times and then do a couple laps of jogging. I've had aboslutely no problem with the jogging until recently. For some reason when we start jogging my legs feel like they are locking up. My ankles start restricting movement and afterwards they hurt along with a pain in the front of my lower leg, almost in the bone. I recently toured a college and did a lot of walking and was absolutely fine but I still have trouble jogging or running in gym class, and the pain lasts 10 minutes afterwards.