Effect of Therapeutic Ultrasound Combined With Exercise on Subacromial Impingement Syndrome

The aim of this study is to analyze the effects of Therapeutic Ultrasound combined with a Therapeutic Exercises program on pain reduction and improvement of function, range of motion (ROM), and functionality in individuals with Subacromial Impingement Syndrome. The main questions it aims to answer are: Can the application of therapeutic ultrasound combined with exercise reduce pain and improve the ability to perform daily activities (functionality) in patients with Subacromial Impingement Syndrome? Does combining therapeutic ultrasound with exercise improve pain and functionality in patients with Subacromial Impingement Syndrome more effectively than using exercise alone to treat this syndrome? Researchers compared the application of therapeutic ultrasound combined with therapeutic exercises with placebo ultrasound (equipment programmed similarly to active ultrasound but emitting ultrasound waves) plus therapeutic exercises to determine if adding active ultrasound to the treatment is more effective than performing exercises alone in treating patients with Subacromial Impingement Syndrome. Patients should be evaluated before the start of treatment, eight weeks after the start of treatment, and six months after the end of treatment. Patients will receive therapeutic ultrasound or placebo combined with exercise 3 times a week for 8 weeks.

Inclusion Criteria: * Age between 30 and 75 years. * Clinical diagnosis compatible with subacromial pain syndrome. * Shoulder pain greater than 30 mm on the Visual Analog Scale. * Pain located in the anterolateral region of the shoulder, worsened during elevation of the upper limb. * At least three positive clinical tests among the following: Neer impingement sign, Hawkins-Kennedy impingement sign, painful arc between 60° and 120° of abduction, Jobe/empty can test, and resisted external rotation/infraspinatus test. * Ultrasonographic confirmation of findings compatible with subacromial pain syndrome. * Signed informed consent form. Exclusion Criteria: * Previous surgery on the affected shoulder. * Suspected massive rotator cuff tear. * Positive drop-arm test. * Glenohumeral instability. * History of shoulder dislocation or subluxation. * Adhesive capsulitis/frozen shoulder. * Recent shoulder trauma. * Previous shoulder fracture with functional impairment. * Cervical radiculopathy with neurological signs. * Active inflammatory rheumatologic disease. * Uncontrolled hypertension. * Neoplasia. * Corticosteroid injection within the previous six months. * Physical therapy treatment for the shoulder within the previous six months. * Continuous use of analgesic or anti-inflammatory medication that could not be discontinued. * Contraindications to therapeutic ultrasound.