Approximately four years ago, I began having knee pain anytime I consistently ran. In addition, it would often turn wrong and pop, causing me not to be able to walk on it for several minutes. After only two treatments, I saw improvement. It no longer pops so easily when turned. It has been about five weeks now. I have been running for two weeks and have experienced no knee pain. Last week, I moved from the treadmill to concrete, still no problems.