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Spokane, Washington  Est. May 19, 1883
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Exercise may cause kneecap pain

Anthony L. Komaroff Universal Uclick

DEAR DOCTOR K: I have pain in my kneecap, right in front of my knee. It hurts to walk down the stairs or even sit for too long. What can I do?

DEAR READER: It sounds like you have what is called patellofemoral pain. That’s pain where your kneecap (patella) meets your thighbone (femur). It usually results from overdoing exercise. Fortunately, there’s a lot you can do to prevent and relieve this pain.

To understand this condition, here’s a brief anatomy lesson. Sit in a chair, and then lift up your foot (on either leg) and hold your leg straight out. How were you able to do this? A big muscle in the front of your thigh (your quadriceps) is attached to a tough tendon. The tendon is like a cord; it runs over the top of your knee and attaches to the biggest bone in your lower leg, the tibia. When your quadriceps muscle shortens and tugs on the tendon, it lifts up your lower leg and foot.

In the middle of the tendon, right over the knee, is a small bone: the patella, or kneecap. It protects the bones of the knee joint by putting a hard bone in front of them to take the hit if you fall on your knee.

Your patella glides within a groove in the thighbone. Anything that stresses that connection can cause patellofemoral pain.

Patellofemoral pain can occur with one-time overuse (such as several sets of tennis when you haven’t played regularly) or from chronic stress. It’s common in people who run a lot, especially on hills. It’s also common in people who play sports involving jumping, or frequent stops or direction changes. Doctors often see it in people who suddenly start to work out much harder and more often.

Pain-free exercise is the cornerstone of treatment. A workout plan to relieve or prevent patellofemoral pain should focus on improving strength and flexibility in the tissues around the knee.

If you’re still in pain after more than one year, you may have to consider surgery. Even then, surgery is recommended only if there is an obvious anatomical problem.

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