Management of Chondromalacia Patella
Exercise therapy combining hip and knee strengthening exercises is the cornerstone of treatment for chondromalacia patella, with the strongest evidence supporting this approach over knee exercises alone. 1
First-Line Treatment: Exercise Therapy
The 2018 International Patellofemoral Pain Research Retreat provides the most recent and authoritative guidance for managing chondromalacia patella (patellofemoral pain). Combined hip and knee exercises should be prescribed to reduce pain and improve function in the short, medium, and long term, and this combination is superior to knee exercises alone. 1
Specific Exercise Prescription
Quadriceps strengthening is essential and strongly supported by evidence 2, 3:
- Focus on sustained isometric exercises for both legs
- Include quadriceps and proximal hip girdle muscles regardless of which joint is affected
- Start with levels within the patient's capability and build up gradually over several months
- Perform "small amounts often" rather than intensive single sessions
- Link exercises to daily activities (e.g., before morning shower) to promote adherence
Closed kinetic chain exercises (semi-squats) are more effective than open kinetic chain exercises (straight leg raises) for reducing Q angle, crepitation, and increasing quadriceps strength 4. This represents an important clinical distinction when prescribing specific exercises.
Exercise Delivery Principles
- Begin with pain-tolerant exercises; if loaded knee flexion is poorly tolerated, emphasize hip exercises initially 5
- Progress based on symptom severity and irritability
- Include aerobic activity and range of motion/stretching exercises 2, 6
- Deliver as an individualized daily regimen that patients can perform independently at home 6
Adjunctive Physical Interventions
Patellar Taping
Patellar taping is recommended for short-term pain relief and functional improvement 2. Evidence shows statistically significant and possibly clinically important effects on pain immediately and 4 days after application. Use medial taping when rehabilitation is hindered by elevated symptom severity, high irritability, or significant fear of movement 5.
Foot Orthoses
Prefabricated foot orthoses are recommended for short-term pain reduction 1. Prescribe when patients respond favorably to treatment direction tests (symptom improvement during functional tasks with orthoses in place), and customize for comfort by modifying density and geometry 5.
Manual Therapy
Manual therapy should be used as an adjunct, not in isolation. Patellofemoral, knee, and lumbar mobilizations are NOT recommended as standalone treatments 1. However, recent evidence suggests that combining manipulative therapy (targeting thoracolumbar, lumbopelvic, and sacroiliac joints) with exercise programs significantly improves disability, balance, and functional performance compared to exercise alone 7.
What NOT to Use
- Electrophysical agents are not recommended 1
- Lateral heel wedges should NOT be prescribed 2
- Isolated mobilizations without exercise therapy 1
Combined Intervention Approach
Combined interventions (exercise therapy plus one of the following: foot orthoses, patellar taping, or manual therapy) are recommended to reduce pain in the short and medium term 1. This represents a higher level of evidence than any single intervention alone.
Emerging Treatment Options
Perineural Dextrose Injection
Recent high-quality evidence shows that 5% dextrose prolotherapy combined with home physical therapy significantly outperforms physical therapy alone 8, 9. At 24 weeks, dextrose prolotherapy reduced pain by 1.67 points on VAS, improved patellofemoral pain severity scores by 15.4 points, and increased functional scores by 9.3 points compared to saline injections 8. This can be considered when conservative measures provide insufficient relief.
Gait/Movement Retraining
Consider movement or running retraining when symptoms are associated with task-specific biomechanics (e.g., excessive stride length in runners) 5. While evidence is still emerging, this addresses biomechanical contributors to symptoms.
Clinical Assessment Priorities
Before initiating treatment, assess:
- Pain levels and fear of movement (influences exercise selection and progression)
- Hip and knee strength (using hand-held dynamometry)
- Movement patterns and foot biomechanics (observe single leg squat or treadmill running)
- Tissue tolerance to load (pain provocation tests, presence of effusion)
- Patellofemoral joint structure/function (patella alta, hypermobility) 5
Education Component
Education should underpin all interventions 5:
- Provide rationale for the specific intervention plan
- Build confidence and understanding of the diagnosis
- Explain that pain does not correlate with tissue damage
- Develop realistic expectations about recovery timeframes
- Promote autonomy and reduce fear of movement
Treatment Algorithm
- Start with combined hip and knee strengthening exercises (closed kinetic chain preferred)
- Add patellar taping if pain severity limits exercise participation
- Consider prefabricated foot orthoses if treatment direction tests are positive
- Add manual therapy to thoracolumbar/lumbopelvic regions if symptoms remain elevated
- Consider perineural dextrose injections if 6+ weeks of conservative therapy shows insufficient improvement
- Reassess after minimum 6 weeks if outcomes are unfavorable; review whether interventions align with assessment findings
Common Pitfalls
- Prescribing knee exercises alone without hip strengthening (less effective) 1
- Using open kinetic chain exercises when closed chain would be more beneficial 4
- Relying on passive modalities (taping, orthoses) without exercise therapy
- Using mobilizations or electrophysical agents in isolation 1
- Prescribing lateral heel wedges (evidence suggests potential harm) 2
If conservative management fails after adequate trial (typically 3-6 months), surgical consultation may be warranted, though 82% of patients respond successfully to comprehensive conservative treatment 10.