Silver Book Fact
Exercise has shown to be effective in reducing persistent pain from osteoarthritis of the knee.
Fransen M, McConnell S. Land-Based Exercise for Osteoarthritis of the Knee: A meta-analysis of randomized controlled trials. J Rhematol. 2009; 36(6): 1109-17. http://jrheum.org/content/36/6/1109.abstract