Comparing high versus low electrical frequencies delivered through fine needles to improve shoulder muscle strength and pain sensitivity

Is this trial a fit for you?

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

Adults with at least one latent myofascial trigger point in the infraspinatus will receive percutaneous electrical nerve stimulation delivered through fine filiform needles using either a high- or low-frequency protocol. Outcomes include objective measures of shoulder muscle strength and pressure pain thresholds measured before and after the intervention. Participants with interfering medications, prior shoulder or spine surgery, neuropathies, generalized pain syndromes, or major medical problems are excluded. The trial is conducted at clinical sites affiliated with the sponsoring Spanish universities and collaborating Polish clinics, addressing a gap in controlled comparisons of stimulation frequency for upper-limb musculoskeletal pain.

Why it matters

Who can join: the full rules

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.

Where it's running

• Atmis
  Nowy Targ, Poland Recruiting
• Atmis
  Krakow, Poland, Poland Not yet recruiting

Study contacts

• Study coordinator: Juan Antonio Valera-Calero, PhD
• Email: juavaler@ucm.es
• Phone: 0034 653 766 841

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How to take part

1. Review the eligibility criteria above with your treating physician.
2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.