Crossposted from another thread I contributed to... My knees aren't horrible, but they definitely hurt, sometimes very much, sometimes they don't even want to support my weight walking to class! I've been experimenting with multiple cures. A combination of the below list has helped MY knees feel much better. There seems to be no magic bullet: 1) No carbonated beverages! The carbon dioxide does more to your body than just making you burp. Definite information and studies are scarce but I've read about it breaking down bones, cartilage, ligaments. Besides, cutting soda is good for you anyway. 2) Grow some more muscle! Eat after your workouts and make sure you're getting enough protein. Grab some protein powder, even. 3) Don't stomp. If there's a move in your style that requires it, don't stomp if it's not a test. 4) Take Aikido? I've been taking Aikido for about two month, you have to get off the floor hundreds of times per session. It worked for me. You might have to substitute with weight lifting or gravity exercises. 5) Find a floor that doesn't hurt! I've managed to train on a wooden basketball gym floor thrice a week while decreasing my injuries sustained from it. However it would be better for your joints if you practice on well-insulated carpet, or similar. 6) Glucosimine/Condroitin! Take these vitamins once *every* day. You won't see results until you've been taking it for about a month. And even then, you can't be 100% certain they help. But I'm not going to stop taking them to find out! Your milage WILL vary, and I agree with Grr, I'd cripple myself doing all those exercises, I rarely work my knees at the gym, and even then I only do 10-15 reps. Share your knee voodoo people! I want to know!