OA is a painful condition that affects many americans, what exercises are effective and what can hurt a client based on science? ADVERTISEMENT 297 viewsJune 30, 2012 0 Chris0 June 30, 2012 0 Comments 8 Answers ActiveVotedNewestOldest 0 Joanne0 Posted 0 Comments Since quadriceps weakness is common in individuals who have OA of the knee joint, exercises to strengthen the knee extensors are in order and I would avoid activities that put excessive impact/compression on the knee joint. You are viewing 1 out of 8 answers, click here to view all answers. Register or Login