Understanding Chronic Patellar Tendonitis

May 11, 2024

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Chronic patellar tendonitis, also known as jumper’s knee or patellar tendinopathy, is a common overuse injury that causes pain and inflammation in the patellar tendon, which connects the kneecap (patella) to the shinbone (tibia). This condition can significantly impact quality of life and limit physical activities. As a medical professional, I aim to provide patients with a comprehensive understanding of chronic patellar tendonitis, its causes, symptoms, diagnosis, treatment options, and preventive measures.

What is Chronic Patellar Tendonitis?

Chronic patellar tendonitis is a condition characterized by persistent pain and inflammation in the patellar tendon, typically resulting from repetitive stress and overuse[1]. The patellar tendon plays a crucial role in extending the knee and enabling activities such as walking, running, and jumping. When the tendon is subjected to excessive strain, microscopic tears can develop, leading to inflammation and pain.

Patellar tendonitis is considered chronic when symptoms persist for more than a few weeks, despite rest and conservative treatment measures. Chronic patellar tendonitis is more common among athletes involved in sports that require frequent jumping, such as basketball, volleyball, and track and field events[2].

Causes and Risk Factors

Several factors can contribute to the development of chronic patellar tendonitis:

  1. Overuse: Repetitive stress on the patellar tendon, often due to high-impact activities or sudden increases in training intensity or duration, can lead to tendon damage and inflammation.
  2. Muscle imbalances: Weakness or tightness in the quadriceps, hamstrings, or hip muscles can alter the biomechanics of the knee joint, placing extra stress on the patellar tendon[3].
  3. Improper technique: Poor form during physical activities, such as incorrect landing mechanics or excessive knee flexion, can increase the strain on the patellar tendon.
  4. Age: As we age, tendons become less flexible and more susceptible to injury.
  5. Genetics: Some individuals may have a genetic predisposition to developing tendon disorders.

Symptoms and Diagnosis

The primary symptom of chronic patellar tendonitis is pain, which can range from a dull ache to a sharp, stabbing sensation. Other common symptoms include:

  • Pain that worsens with activity, particularly during jumping or running
  • Tenderness or swelling at the base of the kneecap
  • Stiffness and decreased range of motion in the knee joint
  • Weakness in the affected leg

To diagnose chronic patellar tendonitis, a healthcare provider will typically:

  1. Review the patient’s medical history and discuss their symptoms and physical activities.
  2. Perform a physical examination to assess knee function, strength, and flexibility.
  3. Order imaging tests, such as X-rays or MRI scans, to visualize the patellar tendon and rule out other potential causes of knee pain[4].

Treatment Options

Treatment for chronic patellar tendonitis aims to reduce pain and inflammation, promote healing, and gradually restore function. A multidisciplinary approach is often most effective, incorporating a combination of the following:

  1. Rest and activity modification: Temporarily reducing or avoiding activities that aggravate symptoms allows the tendon to heal[5].
  2. Ice therapy: Applying ice to the affected area for 15-20 minutes several times a day can help reduce pain and inflammation.
  3. Non-steroidal anti-inflammatory drugs (NSAIDs): Over-the-counter medications like ibuprofen or naproxen can help manage pain and inflammation.
  4. Physical therapy: A physical therapist can design a customized rehabilitation program that includes stretching, strengthening exercises, and techniques to improve knee function and biomechanics.
  5. Orthotic devices: Knee straps or braces can help redistribute forces on the patellar tendon and alleviate symptoms during activity.
  6. Extracorporeal shockwave therapy (ESWT): This non-invasive treatment uses high-energy sound waves to stimulate healing in the damaged tendon[6].
  7. Injections: In some cases, corticosteroid or platelet-rich plasma (PRP) injections may be recommended to reduce inflammation and promote healing.
  8. Surgery: In severe cases that do not respond to conservative treatment, surgical intervention may be necessary to repair or remove damaged tendon tissue.

Prevention Strategies

Preventing chronic patellar tendonitis involves minimizing the risk factors that contribute to the condition:

  1. Gradual progression: Gradually increasing the intensity and duration of physical activities allows the body to adapt and reduces the risk of overuse injuries[7].
  2. Proper technique: Learning and maintaining proper form during activities, especially when jumping or landing, can minimize stress on the patellar tendon.
  3. Cross-training: Incorporating low-impact exercises, such as swimming or cycling, can help maintain fitness while reducing the strain on the patellar tendon.
  4. Strength and flexibility training: Regular exercises to strengthen the quadriceps, hamstrings, and hip muscles, as well as stretching to maintain flexibility, can help prevent muscle imbalances and reduce the risk of tendon injury.
  5. Adequate rest and recovery: Allowing sufficient time for the body to recover between training sessions or competitions is essential for tissue repair and preventing overuse injuries.

When to Seek Medical Attention

While mild cases of patellar tendonitis may resolve with rest and self-care measures, it is essential to seek medical attention if:

  • Pain persists for more than a few weeks despite conservative treatment
  • Pain is severe or significantly limits daily activities
  • Swelling, redness, or warmth develops around the knee joint
  • There is a visible deformity or instability in the knee

Prompt evaluation and treatment can help prevent the condition from becoming chronic and minimize the risk of long-term complications[8].

The Importance of Patient Education and Engagement

As a medical professional, I believe that patient education and engagement are crucial for the successful management of chronic patellar tendonitis. By providing patients with a clear understanding of their condition, its causes, and available treatment options, we empower them to make informed decisions about their care and actively participate in their recovery process.

Encouraging patients to adopt healthy lifestyle habits, such as maintaining a balanced diet, staying hydrated, and getting adequate sleep, can also support the healing process and overall well-being[9]. Additionally, emphasizing the importance of adherence to prescribed treatment plans and follow-up appointments can help ensure the best possible outcomes.

Conclusion and Key Takeaways

Chronic patellar tendonitis is a common and potentially debilitating condition that affects many individuals, particularly athletes. By understanding the causes, symptoms, and available treatment options, patients can work with their healthcare providers to develop an effective management plan and minimize the impact of the condition on their daily lives.

Key takeaways:

  1. Chronic patellar tendonitis is caused by repetitive stress and overuse of the patellar tendon, leading to pain and inflammation.
  2. A multidisciplinary approach, including rest, physical therapy, and other conservative measures, is often most effective in managing the condition.
  3. Preventing chronic patellar tendonitis involves gradual progression, proper technique, cross-training, strength and flexibility training, and adequate rest and recovery.
  4. Seeking prompt medical attention for persistent or severe symptoms is essential to prevent long-term complications.
  5. Patient education and engagement are crucial for the successful management of chronic patellar tendonitis and overall well-being.

By working closely with healthcare providers and implementing preventive measures, patients can effectively manage chronic patellar tendonitis and maintain an active, healthy lifestyle. Remember, early intervention and a proactive approach are key to achieving the best possible outcomes.


  1. Rudavsky, A., & Cook, J. (2014). Physiotherapy management of patellar tendinopathy (jumper’s knee). Journal of Physiotherapy, 60(3), 122-129. https://doi.org/10.1016/j.jphys.2014.06.022
  2. Larsson, M. E. H., Käll, I., & Nilsson-Helander, K. (2012). Treatment of patellar tendinopathy—a systematic review of randomized controlled trials. Knee Surgery, Sports Traumatology, Arthroscopy, 20(8), 1632-1646. https://doi.org/10.1007/s00167-011-1825-1
  3. van der Worp, H., van Ark, M., Roerink, S., Pepping, G. J., van den Akker-Scheek, I., & Zwerver, J. (2011). Risk factors for patellar tendinopathy: A systematic review of the literature. British Journal of Sports Medicine, 45(5), 446-452. https://doi.org/10.1136/bjsm.2011.084079
  4. Warden, S. J., Kiss, Z. S., Malara, F. A., Ooi, A. B. T., Cook, J. L., & Crossley, K. M. (2007). Comparative accuracy of magnetic resonance imaging and ultrasonography in confirming clinically diagnosed patellar tendinopathy. The American Journal of Sports Medicine, 35(3), 427-436. https://doi.org/10.1177/0363546506295179
  5. Malliaras, P., Cook, J., Purdam, C., & Rio, E. (2015). Patellar tendinopathy: Clinical diagnosis, load management, and advice for challenging case presentations. Journal of Orthopaedic & Sports Physical Therapy, 45(11), 887-898. https://doi.org/10.2519/jospt.2015.5987
  6. van der Worp, H., Zwerver, J., Hamstra, M., van den Akker-Scheek, I., & Diercks, R. L. (2014). No difference in effectiveness between focused and radial shockwave therapy for treating patellar tendinopathy: A randomized controlled trial. Knee Surgery, Sports Traumatology, Arthroscopy, 22(9), 2026-2032. https://doi.org/10.1007/s00167-013-2522-z
  7. Visnes, H., & Bahr, R. (2007). The evolution of eccentric training as treatment for patellar tendinopathy (jumper’s knee): A critical review of exercise programmes. British Journal of Sports Medicine, 41(4), 217-223. https://doi.org/10.1136/bjsm.2006.032417
  8. Khan, K. M., Cook, J. L., Kannus, P., Maffulli, N., & Bonar, S. F. (2002). Time to abandon the “tendinitis” myth. BMJ, 324(7338), 626-627. https://doi.org/10.1136/bmj.324.7338.626
  9. Rees, J. D., Maffulli, N., & Cook, J. (2009). Management of tendinopathy. The American Journal of Sports Medicine, 37(9), 1855-1867. https://doi.org/10.1177/0363546508324283
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