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Causes:
The common knee problem may be attributed to muscle weakness or imbalance of the quadriceps muscle group or may be the consequence of tight muscles or other soft tissues in the region around the patella. Various factors may lead to abnormal tracking of the patella as it glides over the front of the femur and consequently may cause symptoms. Biomechanical implications and incorrect footwear may also be the cause of the condition or aggravate the problem once the joint becomes inflamed
Inflammatory Activities :
The Symptoms are often brought on by hill walking, climbing stairs, running, cycling and other sports involving repetitive knee bending actions. The pain may also be exacerbated by driving and sitting down for prolonged periods. Other leisure activities that involve repetitive knee bending and weight bearing with load can also irritate the problem.