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Could a tiny needle zap away shoulder pain? new trial tests best frequency

NCT ID NCT07269925

Symptom relief Sponsor: Universidad Complutense de Madrid Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 24, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study compares two electrical frequencies (high vs. low) used in percutaneous electrical nerve stimulation (PENS) for shoulder pain. Thirty adults with a trigger point in the infraspinatus muscle will receive a single session, and researchers will measure changes in muscle strength and pain sensitivity. The goal is to find the optimal dosage for this technique, which is still being explored for chronic pain.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
Percutaneous electrical nerve stimulation (PENS) at high or low frequency
What this could lead to
If successful, this could help identify the best electrical frequency for easing shoulder pain and improving muscle strength using a needle-based stimulation technique.
What could go wrong
This is a small, early-phase study with only 30 participants and no control group, so results may not apply broadly. The technique is still experimental and its benefits over standard treatments are not proven.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

About 30 people

The number the study aims to enrol. It can still change while the study runs.

Started

Feb 2026

Expected to finish

Jul 2026

An estimate. End dates often move.

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

18 to 65 years

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Presence of at least one latent myofascial trigger point (MTrP) in the infraspinatus muscle, identified according to the most recent Delphi consensus criteria. * Ability to read, understand, and sign the written informed consent form. Exclusion Criteria: * Current pharmacological treatment that may affect muscle tone. * History of shoulder or spinal surgery. * Traumatic disorders such as whiplash-associated injuries, dislocations, or fractures. * Neuropathies, including radiculopathies or myelopathies. * Severe medical conditions (e.g., tumors, fractures, neurological or systemic diseases). * Clinically relevant asymmetries. * Generalized musculoskeletal conditions such as fibromyalgia.

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Conditions

The condition(s) this trial relates to.

myofascial pain syndrome Shoulder Pain

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Shoulder pain

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    2 sites. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • ATMIS

    NOT_YET_RECRUITING

    Krakow, Poland, Poland

  • ATMIS

    RECRUITING

    Nowy Targ, 34-400, Poland

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