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Adduction and Infraspinatus Activity in Shoulder Pain

NCT07765056 · Status: COMPLETED · Phase: NA · Type: INTERVENTIONAL · Enrollment: 44

Last updated 2026-08-14

No results posted yet for this study

Summary

The goal of this randomized crossover trial is to determine whether different levels of shoulder adduction pressure during an external rotation exercise change shoulder muscle activity in adults with chronic shoulder pain and adults without shoulder pain. The main question is whether adding a small amount of shoulder adduction pressure increases activity of the infraspinatus muscle without increasing activity of the deltoid muscles. Researchers will compare three levels of adduction pressure (0, 5, and 10 mmHg) during the same external rotation exercise. Participants will perform the three exercise conditions in a randomly assigned order while researchers measure shoulder muscle activity using surface electromyography.

Conditions

  • Chronic Shoulder Pain

Interventions

BEHAVIORAL

Shoulder External Rotation With 0 mmHg Adduction Pressure

Participants performed the shoulder external rotation exercise while maintaining 0 mmHg of isometric shoulder adduction pressure against a biofeedback wedge. The exercise was performed with the shoulder positioned at approximately 45 degrees of external rotation from 0 degrees of glenohumeral rotation.

BEHAVIORAL

Shoulder External Rotation With 5 mmHg Adduction Pressure

Participants performed the shoulder external rotation exercise while maintaining 5 mmHg of isometric shoulder adduction pressure against a biofeedback wedge. The exercise was performed with the shoulder positioned at approximately 45 degrees of external rotation from 0 degrees of glenohumeral rotation.

BEHAVIORAL

Shoulder External Rotation With 10 mmHg Adduction Pressure

Participants performed the shoulder external rotation exercise while maintaining 10 mmHg of isometric shoulder adduction pressure against a biofeedback wedge. The exercise was performed with the shoulder positioned at approximately 45 degrees of external rotation from 0 degrees of glenohumeral rotation.

Sponsors & Collaborators

  • Universidad de La Frontera

    lead OTHER

Principal Investigators

  • Germán Gálvez García, PhD · Universidad de La Frontera

Study Design

Allocation
RANDOMIZED
Purpose
OTHER
Masking
NONE
Model
CROSSOVER

Eligibility

Min Age
18 Years
Sex
ALL
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2023-08-01
Primary Completion
2024-08-01
Completion
2024-08-01

Countries

  • Chile

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT07765056 on ClinicalTrials.gov