I want to thank you for all your advice and encouragement for my upcoming knee surgery. I have done the "Irvies" exercises faithfully, and I definitely feel stronger. Maybe that's why my jeans keep getting baggier, especially in the seat. You could say the exercises benefit all 3 knees -- left knee, right knee, and hi-ney. I am looking forward to getting the op over with, get back on my feet and start kicking a$$ again!