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Patellofemoral Pain Syndrome (Runner’s Knee)

Patellofemoral Pain Syndrome (Runner’s Knee)

What is PFPS?

PFPS is a primary cause of knee pain that will affect 25% of people at some point in their lives. It’s even more common in runners, hence being known as runner’s knee. The pain is felt behind the kneecap because of damage to or irritation of the articular cartilage that is present where the patella meets the thigh bone (femur).

The Cause

PFPS is an overuse injury caused by the irregular movement and rubbing of the kneecap over the thigh bone, while the knee is bending and straightening. It is the repetitive bending and straightening of the knees that makes this condition more prevalent in runners.

Instead of gliding smoothly when the knee is bent, poor knee alignment causes the kneecap to mistrack and instead rub against the thigh bone itself. This causes irritation at the joint and damage to the underlying cartilage and bone. Other causes can include:

  • Muscular imbalances within the quadriceps muscles
  • Increasing training intensity
  • Overloading the knee during squatting/jumping
  • Poor foot biomechanics
  • Poor alignment of the lower limbs
  • Increasing age
  • Female gender (because of the differences in leg alignment, a greater tendency for joint laxity, generally weaker hip muscles and hormonal fluctuations)

Aside from running, PFPS typically is particularly prevalent in basketball, football, volleyball, netball, skiing and other running/jumping sports.

The Symptoms

Symptoms tend to come on gradually during high-impact activities such as running, squatting and climbing stairs. It can then continue during low-impact activities like walking and for some, may even be felt during rest. Symptoms include:

  • Pain and tenderness behind the kneecap
  • Radiating pain around the knee
  • Inflammation
  • Pain after prolonged sitting

The Treatment

Treating PFPS involves addressing the cause of your pain and correcting any alignment issues that may cause the pain to recur in the future. This often involves:

  • Orthotics - to correct abnormal foot and leg posture
  • Footwear assessment - so your shoes are helping and not hindering your recovery
  • Strengthening weak muscles to restore good function
  • Stretching to restore a good range of motion through your joints and muscles to facilitate recovery
  • Gait retraining and running technique analysis to reduce mistracking and overuse tendencies where possible
  • Activity modification to reduce strain from the knee joints temporarily

It is crucial not to delay treating PFPS to avoid further damage to the knee joint and the articular cartilage. Because articular cartilage works to protect the bone ends and help them glide smoothly against each other, the more it is damaged, the higher the likelihood for further knee pain and problems.

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South Burnett Podiatry
South Burnett Podiatry

13 Alford St, Kingaroy
Queensland 4610, Australia

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+61 7 4162 7633

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