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Current evidence · Information for medical professionals
Lifting a coffee cup, opening a door or shaking someone’s hand: with tennis elbow, ordinary movements can trigger marked pain on the outside of the elbow. When symptoms persist for months, platelet-rich plasma, or PRP, is often discussed. But how strong is the scientific evidence?
Key point
PRP is a treatment option discussed for chronic tennis elbow, but it is not a scientifically established cure. Some studies report more favourable longer-term results than corticosteroid injections. A reliable additional benefit over placebo, however, has not yet been confirmed.
What is tennis elbow?
Tennis elbow is generally described medically as lateral elbow tendinopathy. It mainly affects the common tendon origin of the wrist extensor muscles on the outer side of the elbow.
The older term “epicondylitis” suggests classic inflammation. In persistent cases, however, altered tendon structure, impaired adaptation to load and reduced tissue capacity are often more relevant. A purely anti-inflammatory view is therefore incomplete.
Typical symptoms
Pain when gripping, lifting, rotating the forearm or extending the wrist.
Who is affected?
Not only tennis players, but also people exposed to repetitive manual or occupational loading.
Possible course
Symptoms may persist for weeks or months and can noticeably reduce grip strength.
Differential diagnosis
Nerve irritation, joint disease or referred symptoms from the cervical spine may cause similar complaints.
Before an injection is considered, the diagnosis should therefore be sufficiently secure. Imaging may be useful in selected cases, but it does not replace clinical assessment.
Why is PRP discussed for tendon disorders?
PRP is prepared from the patient’s own blood. Centrifugation produces a plasma fraction that may contain a higher platelet concentration than the original blood sample.
Activated platelets release signalling molecules involved in cell communication, regulation of inflammatory processes and remodelling of the extracellular matrix. This provides a biologically plausible rationale for use in tendon disorders.
Important: Biological plausibility is not the same as proven clinical efficacy. A higher platelet concentration does not automatically produce a better outcome. A 2024 systematic review found no clear association between platelet concentration and pain relief in lateral elbow tendinopathy. [5]
PRP is also not a stem-cell therapy. Its rationale is based mainly on platelets, plasma proteins and the signalling molecules released during activation.
What do current studies show about PRP for tennis elbow?
The answer depends heavily on the comparator. This explains much of the apparent conflict between studies.
| Comparison | Short term | Longer term | Interpretation |
|---|---|---|---|
| PRP vs corticosteroid | Corticosteroid often provides faster pain relief. | Several studies report more favourable pain or function scores for PRP after six to twelve months. | Partly favourable Not every statistical difference is clinically noticeable. |
| PRP vs placebo | No reliable advantage for pain or function. | No consistent additional benefit during longer follow-up. | Not confirmed Placebo-controlled data do not support a general efficacy claim. |
| PRP plus rehabilitation | Outcomes depend on patient selection, load management and accompanying treatment. | Individual PRP should not be separated from a functional rehabilitation plan. | |
PRP compared with corticosteroid
Meta-analyses published in 2024 and 2025 show a recurring pattern: corticosteroid injections may produce better results during the first weeks. At six months or later, some studies report more favourable pain and function scores in PRP groups. [2] [4]
A randomised study published in 2026 also reported stronger early improvement after corticosteroid and more favourable results for PRP after six and twelve months. [2]
This comparison is not sufficient on its own. Performing better than a treatment whose effect may decline over time does not prove that PRP is superior to placebo or to the natural course of the condition.
PRP compared with placebo
A 2026 meta-analysis of randomised placebo-controlled trials reached a cautious conclusion: PRP did not significantly improve pain or function compared with placebo at any of the examined time points. [1]
A randomised four-group study published in 2025 produced a similar result. PRP, corticosteroid, hyaluronic acid and saline were compared. Symptoms improved over time in every group, but none of the injections was clearly superior to saline in the longer term. Corticosteroid showed only an early short-term advantage. [3]
What can be concluded?
PRP may look more favourable than corticosteroid during longer follow-up. A specific clinical benefit over placebo has not been demonstrated reliably. Claims that PRP cures tennis elbow or safely repairs the tendon are therefore not supported by the current evidence.
Why do study results differ so much?
“PRP” is not one fully standardised preparation. Systems and study protocols differ considerably.
- Platelet concentration and recovered plasma volume
- Leukocyte content
- Anticoagulant and possible activation method
- Centrifugal force, run time and number of centrifugation steps
- One injection or a series of injections
- Ultrasound-guided or landmark-based application
- Duration and severity of symptoms
- Accompanying physiotherapy and load management
- Different outcome measures and follow-up periods
Results from a specific protocol cannot automatically be transferred to every tube system, centrifuge or patient.
Clinical relevance also matters. A statistically measurable difference may still be too small for patients to perceive as a clear improvement. The minimum clinically important difference should therefore be considered alongside statistical significance.
What does the evidence mean for clinical practice?
PRP should not be presented as a guaranteed cure or as a completely risk-free autologous treatment. Autologous material reduces some immunological risks, but an injection remains an invasive procedure.
Depending on the technique, transient pain, local reactions, bruising and other injection-related complications may occur. A successful outcome cannot be guaranteed.
Balanced patient information should make clear that:
- The evidence is mixed and depends on the comparator.
- The onset of a possible effect cannot be fixed to a specific number of days or weeks.
- There is no universally proven schedule with a defined number of sessions.
- Symptoms may temporarily increase after the procedure.
- PRP does not replace appropriate load management or functional rehabilitation.
Active rehabilitation remains the foundation
Current physiotherapy guidance places active measures at the centre of care. These include load-adjusted isometric, concentric and eccentric exercise for the wrist extensors. Depending on the findings, manual therapy, ergonomic changes and gradual progression of load may be added. [6]
An injection should therefore not be planned in isolation. Relevant questions include:
- Is the diagnosis sufficiently secure?
- How long have symptoms been present?
- Which conservative measures have already been tried?
- Has the provoking load actually been modified?
- Is there a structured rehabilitation plan?
- How will pain, function and grip strength be documented?
Suitable outcome measures include the Patient-Rated Tennis Elbow Evaluation, or PRTEE, standardised pain scales and pain-free grip strength.
What really matters in PRP preparation?
A tube or centrifuge does not determine the clinical result on its own. For a professional and traceable workflow, however, technical preparation should be as consistent and well documented as possible.
- Select medical devices according to intended purpose and instructions for use
- Check compatibility of tube, centrifuge, rotor and adapter
- Maintain sterile or otherwise appropriately controlled hygienic procedures
- Document relative centrifugal force in × g
- Record run time, lot number, recovered volume and accessories used
- Do not transfer rpm settings between different centrifuge models without checking
RCF rather than a universal rpm value: Centrifugal force depends on both speed and rotor radius. Two centrifuges can produce different RCF values at the same rpm. The specified target in × g is therefore more meaningful than a universal rpm setting.
Technical product context for professional users
Vi PRP-PRO in a professional PRP workflow
Vi PRP-PRO is a sterile borosilicate-glass PRP tube for professional preparation of platelet-rich plasma. It is CE marked and documented as a class IIa medical device.
Intended blood drawapproximately 9 ml per tube
Anticoagulant0.8 ml sodium citrate
Separation componentthixotropic separation gel
Possible PRP yieldapproximately 4–4.5 ml per tube
Standard protocol1200 × g for 7 minutes
Pack contents10 sterile tubes
Actual yield may vary with starting material and preparation process. The current instructions for use, centrifuge approval, rotor configuration and internal procedures of the medical facility remain decisive.
A standardised tube system may support a reproducible technical workflow. It does not provide a guarantee of efficacy for tennis elbow or any other specific indication.
International availability through prpmed.de
Vi PRP-PRO and further accessories for professional PRP workflows are available through prpmed.de in numerous European and selected international markets. Actual availability depends on the destination country, shipping route and applicable import and product regulations. Available shipping options and costs are shown during checkout.
Frequently asked questions about PRP for tennis elbow
Does PRP help tennis elbow?
The evidence is not conclusive. Some studies report more favourable results than corticosteroid after several months. A reliable additional benefit over placebo has not yet been confirmed.
Is PRP better than corticosteroid?
Corticosteroid may work faster in the short term. Some studies report more favourable pain or function scores for PRP after six to twelve months. This does not automatically mean that PRP is also superior to placebo.
How many PRP injections are required?
There is no generally accepted and consistently proven schedule. The number and interval of injections depend on the protocol, clinical findings and medical decision.
When may an effect occur?
A fixed onset cannot be predicted reliably. Studies use different follow-up periods, and individual courses may vary considerably.
Is a PRP injection free from side effects?
No. Autologous material reduces some immunological risks, but the injection remains invasive. Temporary pain, local reactions, bruising and other procedure-related complications are possible.
What role does physiotherapy play?
Load management and active exercise are central conservative measures. An injection should not be treated as a replacement for structured rehabilitation.
Which factors matter in PRP preparation?
Relevant factors include intended purpose, instructions for use, centrifugal force in × g, run time, rotor and adapter compatibility, hygiene and traceable documentation.
Conclusion: PRP may be an option, but it is not a proven cure
The scientific assessment of PRP for tennis elbow remains nuanced. Several studies report more favourable long-term results than corticosteroid. Placebo-controlled trials have not yet confirmed a reliable independent benefit.
In practice, any use should be based on a secure diagnosis, realistic patient information, individual medical assessment and structured rehabilitation. Guaranteed outcomes or general healing claims are not supported by the evidence.
For technically standardised PRP workflows, medical professionals can find PRP tubes, centrifuges and accessories for blood collection and preparation at prpmed.de.
Scientific sources
- Antunes Júnior CR et al.: Platelet-Rich Plasma Does Not Improve Pain or Function in Patients With Lateral Epicondylitis as Compared With Placebo: A Meta-analysis of Randomized Clinical Trials. American Journal of Sports Medicine, 2026. PubMed
- Wilson JJ et al.: A Randomized Controlled Trial of 1-Year Clinical Outcomes of Corticosteroid Versus Platelet-Rich Plasma Injection for Lateral Epicondylitis. Orthopaedic Journal of Sports Medicine, 2026. PubMed
- Dejnek M et al.: Comparative Efficacy of Platelet-Rich Plasma, Corticosteroid, Hyaluronic Acid and Saline Injection in Lateral Epicondylitis. Journal of Clinical Medicine, 2025. PubMed
- Maroun R et al.: Platelet-Rich Plasma Versus Corticosteroids for Lateral Epicondylitis: A Systematic Review and Meta-analysis. Clinics in Shoulder and Elbow, 2025. PubMed
- Averell N et al.: The Concentration of Platelets in PRP Does Not Affect Pain Outcomes in Patients With Lateral Epicondylitis: A Systematic Review and Meta-analysis. 2024. PubMed
- Lucado AM et al.: Lateral Elbow Pain and Muscle Function Impairments: Clinical Practice Guidelines. Journal of Orthopaedic & Sports Physical Therapy, 2022. Guideline