EMTT next to shockwave: what does the shoulder test show?

What patients were involved?

The research by Klüter and colleagues from 2018 is regularly used to support EMTT in addition to shockwave. Participants had rotator-cufftendinopathy for more than three months without calcification. That's a specific shoulder diagnosis, not a collection group with every kind of shoulder pain.

That distinction determines who the outcome can be relevant to. A frozen shoulder, an important tear in a tendon or calcification raises other questions. So you can't just say that you fit in with this research group on the basis of shoulder symptoms.

A treatment proposal must first be made clear which diagnosis fits your story and research. Then you can discuss whether the study has enough agreement to take into consideration.

What was compared to each other?

Both groups got focused shockwave. One group also received active EMTT, the other received a placebo version of EMTT. Both groups also received physiotherapy. The complete publication describes this combination setup.

The study therefore asks in particular whether the addition of EMTT made a difference within this programme. It does not simply compare EMTT with no treatment. Nor is it investigating radial shockwave as the basis of the combination.

A scheme makes the comparison understandable:

The common parts are important. They prevent the entire progress of the active group from being attributed to one additional technique.

What can you derive from the outcome?

The combination group had on average more favourable pain and shoulder function during the last assessment. Follow-up was up to 24 weeks. This supports a cautious positive conclusion on the addition to this specific research situation.

It's not a personal success rate. An average score does not tell how many people became completely pain-free or what outcome you will have. There is also no evidence from this comparison for a lasting effect over several years.

For a patient, it is particularly relevant whether the measured outcome is appropriate for one's own purpose. A favourable pain or function score may have meaning, but is not equal to returning to any job or sports load. That step requires an own assessment.

Why the context of the guideline is included

The JOSPT guideline for rotator cufftendinopathy from 2025 recommends against ESWT for symptoms without calcification. This is an important qualification, because the positive combination study concerned non-calcific shoulder tendon symptoms.

A separate study of an addition does not automatically reverse a guideline opinion on basic treatment. So you have to keep two questions apart: did the addition in the study show an advantage, and is the total treatment program a natural first choice? The first can be positive while the second can remain cautious.

A careful center mentions both. Otherwise, there is the impression that a limited research result is sufficient to offer a combination as an established standard.

What has not yet been conclusively demonstrated?

The study included a limited group and did not have a separate arm with EMTT alone. This means that you cannot determine whether both techniques are biologically reinforcing each other. The word synergy requires more than a better result from one combination compared to another.

Generalisation to other conditions is also not justified. heel pain, Achilles tendon symptoms and tennis elbow have not been studied in this study. The same applies to a package in which other techniques are added.

In addition, independent repetition and carefully reported larger studies are desirable. Interests, intent and limitations are part of the interpretation. A promising outcome deserves follow-up research, no extension to claims that fall outside the research question.

How do you use this in a treatment interview?

First, ask if your diagnosis matches the surveyed group. Then discuss why a combination is proposed despite the cautious guideline context. A substantive answer should make the uncertainty visible.

Also ask which active plan you keep following and how the added value is evaluated. When several parts change at the same time, it is personally difficult to determine which part makes a difference. That's no reason not to do anything, but to keep the overall plan clear.

A justifiable expectation is that there is a positive but limited research signal for this specific supplement. The choice requires consideration of possible profits, uncertainty, security, time and costs. This gives the study a suitable place in the conversation.