PRP has its best evidence in tennis elbow, where trials found better 1-year results than cortisone (Peerbooms, 2010; Mishra, 2014). Results for plantar fasciitis are promising; for chronic Achilles tendinopathy, a JAMA trial (de Vos, 2010) found no benefit over saline. Preparation differs between clinics.
| Tendon | PRP evidence |
|---|---|
| Tennis elbow | Positive trials |
| Plantar fasciitis | Some positive trials vs cortisone |
| Patellar tendon | Small studies |
| Achilles | Main trial negative |
| Rotator cuff | Mixed |
PRP or stem cells for tendons?
| PRP | Stem cells | |
|---|---|---|
| Source | Your own blood | Bone marrow, fat or screened donor tissue |
| Best evidence | Tennis elbow | Rotator cuff repair, partial cuff tears, tennis elbow |
| What it delivers | Growth factors | Cells that release repair signals |
Many plans combine both. A doctor recommends the right option after reviewing your scan.
Tendon pain for more than 3 months? Get the free guide and a doctor review of your scan.
What to expect
Blood is drawn and spun, then the PRP is injected into the tendon under ultrasound. Expect soreness for a few days, then a staged return to loading.
Common questions
How many injections? Often 1 to 3, depending on the tendon and plan.
Can I train after PRP? Light activity within days; heavy loading is built up over weeks.
