Yes, thanks guys ....... For the past 13 months , ever since I had my orthoscopic surgery on both knees in Jan of 2013 ( which didnt help AT ALL !!! ) , i've been pretty faithful with a little workout I do 3 times a week. ( upper body exercises ) and I feel like I've increased my upper body strength, and maybe even got a little buffed in the process !! ha ha , I've also experienced a dozen times or so with a leg extension exercise to strengthen my quads , with what i thought was light weight , however that excercise seemed to give me more leg ( knee ) discomfort. Maybe I will experience with a different type of leg exercise. Anyone have any suggestions regarding that ?