I don't know if you remember my running with chondromalacia grade III question - but I have another. A person convinced me to get a chopat dual action knee strap like this: http://www.amazon.com/Cho-Pat-Action.../dp/B000QRG970 I got one - and I've only ran in it once, today. Today was my schedule 'long run' - 7 miles. Normally at the end my knee is sore, crunchy, and a hot bath and ibuprofen then ice is what makes it feel better. Today, I wore this strap - and I normally don't talk about miracles - but I didn't need any of the above and the knee is just fine right now. In fact, I'm considering and afternoon walk (normally, I was out for the day after a long run). Me liking to know how/why things work - I thought of you. If this thing works this dramatically for me - what does that mean? By what mechanism does it improve things? Does this actually 'lessen' the damage, etc? Finally, does this 'clue' you or someone else in more as to what is actually wrong with my knee. Knowing that this thing works so dramatically, could this guide me as to things I could concentrate on to make running without it possible? Thanks for sharing your knowledge on this one.