Shoulder Embolization vs. Physical Therapy: Competitors or Partners?

Physical therapy is the backbone of frozen shoulder care, and for good reason. It is low-risk, it builds the motion and strength you need for daily life, and it is part of nearly every other treatment. Shoulder embolization is a procedure aimed at pain and inflammation. So the real question is usually not "embolization or physical therapy," but "when does adding embolization make sense?" This article explains what each does well and how they work together.

What physical therapy does for frozen shoulder

A typical program includes stretching, joint mobilization by a therapist, and a home exercise routine, sometimes alongside pain relief such as medication or an injection. The goal is to keep the capsule moving, regain range of motion, and maintain strength while the inflammation runs its course.

The evidence for therapy alone is mixed, partly because trials are hard to compare. A Cochrane review of 32 trials with 1,836 participants found that a combination of manual therapy and exercise probably gives less short-term improvement than a steroid injection at 7 weeks, but by 6 and 12 months the differences were not clinically important. A 2020 meta-analysis found that adding a home exercise program and physiotherapy to a steroid injection may add benefit in the medium term.

The UK FROST trial offers an important real-world comparison. People randomly assigned to early structured physiotherapy, which combined up to 12 therapy sessions over 12 weeks with a steroid injection, reached an average Oxford Shoulder Score of 37.2 out of 48 at 12 months. That was not meaningfully different from the scores after manipulation under anesthesia (38.3) or capsular release surgery (40.3).

Where physical therapy can fall short

Therapy depends on being able to move the shoulder, and that is hard when every stretch hurts. Common frustrations include:

• Pain that limits progress. When the shoulder is very inflamed, stretching can feel impossible, and sessions may stall.
• Night pain. Poor sleep makes recovery harder and is not something exercise addresses directly.
• Diabetes. Frozen shoulder is about 5 times more common in people with diabetes, according to a 2016 meta-analysis. In one small embolization study, patients with diabetes also had less complete long-term relief, so blood sugar control is worth discussing with your care team whichever treatment you choose.
• A slow natural course. A 2017 systematic review found no evidence that frozen shoulder reliably progresses through phases to full recovery without treatment, and most improvement happened early rather than late.

The patients studied for embolization had usually already done a lot of therapy. In a 2024 Spanish study, patients had a median of about 13 weeks of rehabilitation before embolization, and 75% were off work.

What embolization adds

Embolization targets the inflamed tissue and the abnormal blood vessels around it, rather than the stiffness itself. In published studies, its biggest early effect has been on pain, especially night pain:

• In a 2017 Japanese study of 25 patients, 67% had night pain cut by more than half within 1 week, and 87% within 1 month
• In a 2022 trial of 100 patients, average night pain dropped from 6.4 to 3.4 out of 10 at 1 month

Range of motion improved more gradually, often over 3 to 6 months. The working idea is that less pain opens a window where stretching and strengthening become possible. These were single-arm studies without comparison groups, so they cannot show how much of the improvement came from embolization rather than from therapy and time.

This article is part of our Embolization Guide.

How they work together

Most embolization programs keep therapy in the plan. The 2024 Spanish study restarted kinesiotherapy and physical therapy between 72 and 96 hours after embolization, continuing until each patient's condition stabilized. In a 2025 Taiwanese study, patients continued their existing therapy and medication but were not allowed new interventions for 6 months, so researchers could measure the effect of the procedure.

A practical way to think about it:

1. Therapy, often with a steroid injection, comes first
2. If pain stays high enough to block progress for months, embolization may be considered
3. Therapy continues afterward to rebuild motion and strength

Our recovery timeline shows how pain and motion typically change in the months after the procedure.

Comparing the two directly

Getting the most out of physical therapy

Whether or not you ever have a procedure, these habits tend to help:

• Do the home program. The exercises between sessions often matter as much as the sessions themselves.
• Stretch within tolerable pain. Forcing a very inflamed shoulder can backfire. Tell your therapist when exercises cause pain that lingers for hours.
• Keep a simple log. Note how high you can reach, how well you sleep, and your pain level each week. This helps you and your doctor see whether you are truly stuck.
• Ask about pain control. If pain is blocking progress, a steroid injection is the usual next step, and the evidence supports combining it with exercise.

If your log shows months of little change despite consistent effort, bring it to your doctor. It is exactly the kind of information that helps decide whether you are a candidate for frozen shoulder embolization.

Trials testing embolization against therapy

Two randomized trials are now addressing this question. Brigham and Women's Hospital in Boston is comparing embolization with physical therapy in 41 patients with chronic shoulder tendinopathy that has not improved after at least 6 months of care, including at least 6 weeks of therapy, with pain measured at 12 months. In South Korea, Chung-Ang University Hospital is comparing embolization with usual conservative care in 44 patients with chronic shoulder pain. Results from both should help clarify the added value of the procedure.

Who should stick with therapy for now

• People in the first months of frozen shoulder who have not yet had a full course of therapy or an injection
• People who are steadily improving, even if slowly
• People whose main problem is stiffness with little pain
• People with health conditions that make a catheter procedure riskier, such as severe contrast allergy, kidney disease, or arm artery disease

If you have done the work and pain is still the barrier, it may be time to talk about next steps. Learn about the condition itself in frozen shoulder causes, symptoms, and stages, and about the procedure on our shoulder embolization page or in the embolization guide.

Frequently Asked Questions

Is shoulder embolization a replacement for physical therapy?

No. Embolization targets pain and inflammation, while therapy restores motion and strength. Most programs continue therapy after the procedure.

How long should I try physical therapy before considering embolization?

Studies required anywhere from 30 days to 6 months of conservative care first, often including at least 6 weeks of therapy. Your doctor will consider how much you have improved, not just the time elapsed.

When can I restart physical therapy after embolization?

In one 2024 study, patients restarted therapy 72 to 96 hours after the procedure. Your doctor will give you specific timing.

Keep Reading

• Shoulder Embolization in Manhattan
• Shoulder Embolization vs. Surgery: MUA and Capsular Release Compared
• Frozen Shoulder: Causes, Symptoms, and Stages Explained
• Frozen Shoulder Embolization: Am I a Candidate?
• How Long Does Shoulder Embolization Last?
• Is Shoulder Embolization Covered by Insurance?
• Embolization Guide: knee, heel, shoulder, elbow and hip

Sources

1. Page et al., Cochrane Database Syst Rev, 2014 — manual therapy and exercise for adhesive capsulitis
2. Challoumas et al., JAMA Netw Open, 2020 — comparison of treatments for frozen shoulder: systematic review and meta-analysis
3. Rangan et al., Lancet, 2020 — UK FROST randomized trial: MUA vs capsular release vs early physiotherapy (503 patients)
4. Wong et al., Physiotherapy, 2017 — natural history of frozen shoulder: a systematic review
5. Lanciego et al., J Vasc Interv Radiol, 2024 — midterm outcomes of embolization for adhesive capsulitis (20 patients)
6. Okuno et al., J Vasc Interv Radiol, 2017 — embolization for adhesive capsulitis resistant to conservative treatment (25 patients)
7. Okuno et al., J Vasc Interv Radiol, 2022 — multicenter feasibility trial for refractory nighttime shoulder pain (100 patients)
8. Liang et al., Korean J Radiol, 2025 — clinical and MRI outcomes of embolization for adhesive capsulitis (25 patients)
9. ClinicalTrials.gov NCT06095050 — embolization vs physical therapy for chronic shoulder tendinopathy (recruiting)
10. ClinicalTrials.gov NCT07336849 — embolization vs usual care for chronic shoulder pain (recruiting)
11. Bagla et al., J Vasc Interv Radiol, 2022 — US investigational device study of adhesive capsulitis embolization (20 patients)
12. Zreik et al., Muscles Ligaments Tendons J, 2016 — adhesive capsulitis and diabetes: a meta-analysis of prevalence

Medically reviewed by David Fox, MD, FACS, RPVI. This article is general information, not a substitute for a medical evaluation.

Living with joint or tendon pain that hasn’t improved? Schedule a consultation with Dr. David Fox at Fox Vein & Vascular in Manhattan to find out whether embolization is right for you. Call (212) 362-3470 or request an appointment online.