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What is patellar tendinopathy
ICD-10 code: M76.5
"Jumper's knee" — degenerative damage to the patellar ligament (patellar tendon) at its attachment to the inferior pole of the patella. Occurs due to overload of the knee extensor mechanism: jumping, running, weighted squats. One of the main reasons for ending a sports career.
Who is at risk
Jumping sports
Volleyball (up to 45% of players!), basketball (32%), track and field (jumping), handball. Frequency directly correlates with the number of jumps in training.
Running and CrossFit
Running on hard surfaces, CrossFit with box-jumps, weighted squats. Load on the ligament during squatting can reach 8 times body weight.
Strength sports
Weightlifting, powerlifting. Deep squats with heavy weight — maximum load on the patellar ligament.
Blazina stages
Stage 1: Pain only after loading
Discomfort after training, resolves in a few hours. Athlete can train at full volume. Ultrasound shows minimal changes.
Stage 2: Pain at the beginning and after loading
Pain at the start of training, decreases after warm-up, returns afterward. Decreased sports performance. Ultrasound shows thickening, hypoechoic zones.
Stage 3: Constant pain
Pain with daily activities: stairs, standing from a chair, squatting. Inability to participate in sports. Ultrasound shows neovascularization, partial tears.
Stage 4: Complete rupture
Rupture of the patellar ligament. Inability to extend the knee. Requires surgical reconstruction.
Diagnosis
Ultrasound (first line)
Thickening of the proximal portion of the ligament (normal 3-5 mm, in tendinopathy 7-12 mm). Hypoechoic zones of degeneration. Doppler — neovascularization (marker of active process). Dynamic examination with knee flexion.
MRI
Hyperintense signal on T2 in the proximal third of the ligament. Thickening. Detects partial tears, paratendinitis, infrapatellar bursitis. MRI mandatory for Blazina 3-4.
Clinical examination
Tenderness on palpation of the inferior pole of the patella (pathognomonic sign). Pain on single-leg squat (single-leg decline squat test). Victorian Institute of Sport Assessment (VISA-P) — standardized questionnaire.
Patellar tendinopathy (jumper’s knee): treatment options and what is known about them
The treatment plan is made by the clinic doctor after an examination and a review of your images. The table shows the options usually discussed for this diagnosis and how well they have been studied.
| Option | What to expect | How well studied |
|---|---|---|
| Exercise therapy and physiotherapy | Reduces pain, strengthens muscles, improves function; the basis of treatment | Well studied, recommended |
| Load management, weight loss | Takes load off the affected area; if overweight, losing 5–10% noticeably reduces pain | Moderate evidence |
| Shockwave therapy | A course of 3–5 sessions; helps some patients with chronic pain | Limited or conflicting evidence |
| PRP / CGF | Concentrate from your own blood; may reduce pain, growth of new tissue has not been shown | Limited or conflicting evidence |
| Corticosteroid injection | — | Not usually used for this diagnosis |
| Tendon surgery (rarely) | If conservative treatment does not help or there is an indication | When indicated — the doctor decides |
We send your request to several partner clinics. Some will suggest conservative treatment or injections, others surgery; each clinic quotes its own conditions and price. We help you compare the options.
Regenerative methods: realistic expectations
In tendinopathies the basis of treatment is graded loading of the tendon: specific exercises over 3–6 months. Shockwave therapy helps some patients. Evidence on PRP is conflicting: there are studies showing benefit in tennis elbow and plantar fasciitis, but no convincing evidence for other tendons. Corticosteroids relieve pain quickly, but the effect is often short, and repeated injections into a tendon are undesirable.
When surgery is discussed. Surgery is discussed for a complete tendon rupture or if pain persists for more than 6–12 months despite proper treatment.
If an injection helps, the effect usually builds up over 6–12 weeks, and the result is assessed after 2–3 months. No clinic can guarantee a result.
Good to know: diagnosis, self-help, outlook
How to tell jumper’s knee from similar conditions
In patellar tendinopathy pain is pinpointed just below the lower edge of the kneecap and worsens with jumping, squatting and at the start of training. Chondromalacia hurts behind the kneecap on stairs and after long sitting, and Osgood–Schlatter disease in teenagers hurts lower, on the tibial tuberosity. Ultrasound shows thickening and blood vessels in the tendon.
What you can do yourself
Reduce jumping load without stopping training completely. The basis of treatment is isometric exercise for pain relief and a progressive quadriceps loading programme (decline squats) for 12 weeks or longer.
Outlook and timelines
Recovery takes 3–6 months and requires patience. Shockwave therapy and PRP injections help some patients alongside exercise. Corticosteroids are not injected into the tendon; surgery is rarely discussed, after prolonged treatment has failed.
Who it is not suitable for and possible risks
Contraindications
- Active infection — at the injection site or systemic, with fever.
- Active cancer or ongoing chemotherapy.
- Blood clotting disorders or a low platelet count. Anticoagulants are discussed with the physician.
- Pregnancy and breastfeeding — the procedure is usually postponed.
- A corticosteroid injection into the same area in recent weeks.
- Severe stage IV osteoarthritis with axial deformity and joint destruction — joint replacement is usually discussed instead.
Possible risks
- Pain and swelling at the injection site for 1–3 days.
- Bruising where blood or fat tissue is taken.
- Rarely, infection. The procedure is therefore performed under sterile conditions with ultrasound or X-ray guidance.
- The effect may be absent or smaller than expected.
If any of these apply to you, mention it in your request. The coordinator will check with the clinic physician whether treatment is possible. Contact a coordinator.
Scientific evidence
Studies of regenerative methods show mixed results. Clinic physicians rely on research including the following:
- Bennell KL et al. Effect of Intra-articular Platelet-Rich Plasma vs Placebo Injection on Pain and Medial Tibial Cartilage Volume in Patients With Knee Osteoarthritis: The RESTORE Randomized Clinical Trial. JAMA, 2021.
- Bannuru RR et al. OARSI guidelines for the non-surgical management of knee, hip, and polyarticular osteoarthritis. Osteoarthritis Cartilage, 2019.
Next steps: Treatment methods · Treatment cost · How treatment in Germany is organised
Questions about patellar tendinopathy
RegenPAS is a patient service centre in Munich, not a clinic. We review your images and symptoms and send a request to several partner clinics at once. Clinics that can accept you send their own conditions and price; prices differ between clinics, and you choose the option that suits you. The coordinator replies within 24 hours, and a clinic physician’s preliminary opinion follows in 1–3 business days. We then arrange the appointment, visa invitation, interpreter, transfers and accommodation. Treatment decisions are made by the clinic physician. Contact a coordinator.
Your MRI (or CT, X-ray) report and the images if you have them, plus a short description of your symptoms and previous treatment. Send them via the form on the website — the assessment is free and without obligation: the coordinator replies within 24 hours, and the clinic physician’s preliminary opinion follows in 1–3 business days.
The cost depends on the method, the diagnostics needed and the clinic itself: prices differ between clinics. We request offers from several clinics and send you their conditions and quotes so you can compare. Price guidance is on the treatment cost page. For an outpatient procedure, 2–3 days in Munich are usually enough: examination, procedure and follow-up visit.
Clinic and method matching — free of charge
Describe your case and attach your MRI report. We will identify clinics that use the relevant methods and forward your request to them. No obligation; we reply within 24 hours.
Send a request