SOURCES:American Academy of Orthopaedic Surgeons: “Common Knee Injuries.”Hochberg, M. Arthritis Care and Research, April 2012.ArthritisToday.org: “Ways to Ease Knee Pain and Get Around.”ArthtitisToday.org: “25 Treatments for Arthritis Hip and Knee Pain.”University of Missouri Health Care: “Use of Heat and Cold for Pain Relief.”Hospital for Special Surgery: “Frequently Asked Questions: What are some of the pharmacological treatments for osteoarthritis pain?”ArthritisToday.org: “Injections and Procedures for Knee Pain.”Hospital for Special Surgery: “Viscosupplementation.”The Kaiser Permanente Medical Group: “Knee Meniscus Cartilage Injuries.” University of Michigan Health System: “Obesity and Anterior Knee Pain.” OTCSafety.org: “Pain Relievers and Fever Reducers.”Advanced Physical Medicine: “4 Exercise Tips for Bad Knees.”Harvard Health Beat: “The secret to joint pain relief – exercise.”Arthritis Foundation: “Tai Chi: A Program for Better Living.”