I'm in the same camp as Bluehills, post #7 . I do knee exercises fairly regularly for a slightly troublesome right knee. When that knee acts up, I step up the exercises and the discomfort goes away. Those exercises consist of lateral moves such as side lunges and others sown in the link. The side leg raises I do with 10# leg weights. https://www.google.com/search?client...w=1302&bih=616