Runner’s knee is one of the most common causes of knee pain, especially among physically active individuals. It can affect people of all ages and fitness levels, not just runners. The condition is frequently seen in those who engage in repetitive knee-bending activities, and is a common complaint in sports medicine and orthopaedic clinics.
What Is a Runner’s Knee?
Runner’s knee is a broad term that describes pain at the front of the knee, often linked to irritation between the kneecap (patella) and the thighbone (femur). It typically results from overuse, poor alignment, or muscle imbalances that place stress on the knee joint during movement. The discomfort usually worsens with activities that involve knee flexion under load.
What Causes Runner’s Knee
Several factors can contribute to the development of patellofemoral pain syndrome:
Overuse and repetitive strain: Activities that involve repeated knee bending, such as running, squatting, or cycling, can irritate the cartilage beneath your kneecap over time.
Kneecap tracking problems: When your kneecap doesn’t move smoothly in its groove during leg movement, this creates uneven pressure and friction against the underlying bone.
Muscle weakness or imbalances: Weakness in your hip muscles or quadriceps can affect how your leg moves, placing additional stress on the knee joint during activities.
Structural factors: Flat feet, high arches, or differences in leg length can alter how weight passes through your knee, potentially contributing to pain development.
Symptoms of Runner’s Knee
Runner’s knee typically develops gradually, with pain that may come and go depending on your activities.
Pain around or behind the kneecap: The discomfort is usually felt at the front of your knee and may be difficult to pinpoint to one specific spot.
Worsening pain during activity: Symptoms often increase when walking downstairs, squatting, kneeling, or sitting with your knee bent for extended periods.
Grinding or clicking sensations: You might notice unusual sounds or feelings when bending and straightening your knee, particularly when climbing stairs.
Stiffness after periods of rest: Your knee may feel uncomfortable when you first stand up after sitting for a while, though this typically improves with gentle movement.
Treatment Options for Runner’s Knee
A hip & knee orthopaedic specialist-led approach focuses on structural correction, pain relief, and long-term joint preservation.
Clinical Evaluation and Imaging: A thorough assessment is performed to evaluate patellar tracking, alignment, cartilage integrity, and soft tissue involvement. Diagnostic tools may include weight-bearing X-rays and MRI scans to identify cartilage wear, trochlear dysplasia, or maltracking.
Injection Therapies: In cases with persistent anterior knee pain or joint inflammation, image-guided injections may be considered. These may include:
- Corticosteroid injections: To reduce acute inflammation in symptomatic flare-ups.
- Platelet-rich plasma (PRP): May be considered for selected patients to support tissue healing.
Surgical Interventions: When non-operative treatments do not provide sufficient relief, surgical options are considered based on the underlying cause:
- Knee arthroscopy: To address cartilage damage, plica irritation, or remove inflamed synovial tissue.
- Lateral release or medial patellofemoral ligament (MPFL) reconstruction: For patients with maltracking or instability.
- Tibial tubercle osteotomy (TTO): In select cases where bony alignment contributes to recurrent patellofemoral pain or cartilage overload.
Post-Surgical Rehabilitation: Structured rehabilitation following surgery is essential to restore function, improve range of motion, and reduce recurrence. Physiotherapy is coordinated to align with surgical recovery goals.
Activities to Limit While Recovering from Runner’s Knee
To prevent worsening of symptoms, the following should be limited during recovery:
- High-impact movements: Running on hard surfaces, jumping, or sudden directional changes
- Deep knee flexion: Squats, lunges, or kneeling positions
- Prolonged sitting: Long periods with the knee bent, such as driving or desk work
- Uneven surfaces: Walking or running on slopes, especially downhill
When to See an Orthopaedic Specialist
Specialist assessment is recommended if knee pain continues for several weeks despite physiotherapy and activity modification. You should also seek review if symptoms interfere with walking, climbing stairs, or daily movement, or if there is swelling, instability, or mechanical signs such as clicking, catching, or locking.
Schedule a consultation with our Orthopaedic Hip & Knee Surgeon to evaluate for underlying structural causes and determine whether further imaging or surgical treatment is appropriate.
