answer:@gailcalled, by the Grace of God, I’m very healthy physically. My husband had some serious knee problems that have resulted in surgery, but not replacement. We live in a retirement community and I have many friends who have had knee replacements. One of my dearest friends is fighting the obvious (knee replacement) at this time and the misalignment in the way she struggles to walk is destroying her hips. I’ve been doing a water class with her that has helped her manage the pain. It is a combination of Tai Chi, Yoga, stretching, posture, core balance…it is very, very spiritual. She is going to turn 70 in September. She said the class helps her pain and the warm water in the pool (outdoor, Florida sunshine heated in the summer pool) helps with the intense pain. She said the coaches vibe is so soothing and positive it helps her mentally as much as physically. I can tell you the people I personally know; an uncle, a co-worker of my husband, several friends, who had knee replacement all say they wish they had done it sooner because the results were so radically life changing.