The other day I was running and toward the end of the run (which was about three miles) I started having some pain at the outside of my left knee whenever that foot hit the ground. Once I finished running, it felt OK pretty quickly so I didn't think too much of it. Today, I did a 14-mile hike with some gradual ups and downs, and a couple of hours into it I started having the same pain, mostly when going downhill. It gradually got worse, and by the end it was getting pretty bad and I was happy to get back to the car. Now it still hurts when I get up from a chair or walk; there's also a tender area above the knee joint. My best guess is that it's an IT band issue, does this sound right? I've never had the problem before but I think between the 17-mile hike last Saturday, running, and today's hike maybe I overdid it...