Been having some knee pain around the knee caps lately. It's not terrible pain, just enough to make those longer hikes uncomfortable. After the hike my legs will stiffen up and get that "tight rubber band" feeling. I'm not old enough for my knees to give out. Anything natural I can do for this? I excersise regularly and I'm not caring any extra weight. Used to run a few miles every day, but now after a mile or so I get the feeling that my knees are going to give out . . .