According to the American Academy of Orthopaedic Surgeons, more than 4.1 million people seek medical care each year for a knee problem.
Some knee problems result from wear of parts of the knee, such as occurs in osteoarthritis.
Other problems result from injury, such as a blow to the knee or sudden movements that strain the knee beyond its normal range of movement. Some knee problems, such as those resulting from an accident, cannot be foreseen or prevented. A supervised workout with weights is another pathway to strengthening leg muscles that benefit the knee. Avoid sudden changes in the intensity of exercise. Increase the force or duration of activity gradually.