Patellar Tendinopathy (Jumper's Knee): Exosome and PRP Options
Medically reviewed by Dr. Charles Pereyra, MD — Medical Director, Springs Rejuvenation. Last reviewed June 22, 2026.
Written by the Springs Rejuvenation regenerative medicine team from direct clinical experience administering stem cell and exosome protocols at our Aventura, Miami center.
Jumper's knee — known clinically as patellar tendinopathy — is the nagging pain just below the kneecap that flares with jumping, squatting, and stairs. It is notoriously stubborn because tendons supports slowly and the injured tissue often becomes disorganized rather than simply inflamed. For athletes and active people who have plateaued on rehab alone, regenerative options are worth understanding.
Why tendons are so slow to recover
Tendon is dense, fibrous tissue with a limited blood supply, so it does not bounce back the way muscle does. In chronic tendinopathy the collagen fibers become disorganized and the tissue can develop a degenerative quality rather than an actively inflamed one. That is exactly why loading the structure correctly matters and why regenerative signaling is being studied here.
Where PRP fits
Platelet-rich plasma has more research behind it than almost any other regenerative option for tendinopathy. By concentrating growth factors from your own blood and placing them at the injured tendon, PRP aims to nudge a stalled repair process forward. Results in studies are encouraging for some patients but inconsistent, and PRP works best when paired with a structured loading program, not instead of one.
Where exosome therapy fits
Exosomes are signaling vesicles intended to support the local tissue environment. The research in tendons is earlier than PRP, so we frame exosome therapy as a supportive option rather than a proven supports, and we are candid about that. At Springs Rejuvenation both options are delivered alongside a rehab plan because the loading work is what teaches the tendon to tolerate force again.
Do I still have to do rehab?
Yes, and this is the part people most want to skip. Progressive tendon loading remains the backbone of recovery. Regenerative injections are intended to support that work, not replace it.
How many sessions are typical?
It depends on how chronic the tendon is and how it responds, and your clinician will map that out. Tendon recovery is measured in weeks to months, and individual results vary.
Can I keep training while I supports?
Often yes, but usually with modified loads and a temporary pause on the movements that aggravate the tendon. Your plan is built around keeping you as active as is reasonable.
The Springs approach to jumper's knee
We assess how chronic the tendinopathy is, whether you have tried adequate loading, and which regenerative option, if any, fits your situation. The injection is one piece of a plan that always includes the rehab that actually rebuilds tendon tolerance. Book a free consultation to find out whether PRP or exosome therapy makes sense for your knee.
Medical Disclaimer: Stem cell and exosome therapy is not an FDA approved therapy and is considered to be in the experimental stages. These statements have not been evaluated by the FDA and are not intended to diagnose, treat, cure, or prevent any disease. Springs Rejuvenation processes exosomes in an FDA approved lab. Individual results may vary. This content is reviewed for medical accuracy by Dr. Charles Pereyra, MD, Medical Director of Springs Rejuvenation, and is provided for educational purposes only. Always consult a qualified physician.