BACKGROUND: High Induction Electromagnetic Stimulation (HIES) is a new treatment modality. The clinical effectiveness of HIES applied in addition to conservative treatment in patients with Subacromial Impingement Syndrome (SIS) is unclear. OBJECTIVE: To examine the effects of HIES, applied in addition to conservative treatment on symptoms, functions, and activities of daily life in patients with SIS. METHODS: A total of 36 participants diagnosed with SIS were included in the single- blinded randomized controlled study. The Visual Analog Scale (VAS) for pain intensity, the Disabilities of the Arm, Shoulder, and Hand Questionnaire (DASH) for upper extremity physical function, and the Constant-Murley Score (CMS) for the level of disability were used. The range of motion (ROM) measurements of the shoulder joint were performed using a goniometer. In the four-week rehabilitation program, one group (n = 19) received conservative treatment for 45 min, five days a week. The other group (n = 17) received HIES in addition to conservative treatment, applied in 10-min sessions with a one-day interval between sessions, for a total of 10 sessions. RESULTS: Post-treatment DASH score was found to be lower in the HIES group than in the conservative treatment group (p < 0.01). When the delta values obtained by subtracting the pre-treatment measurements from the post-treatment measurements were examined, the delta VAS (p = 0.037) and delta DASH (p < 0.01) values were significantly different between the two groups. CONCLUSIONS: HIES applied in addition to conservative treatment in patients diagnosed with SIS is more effective than conservative treatment alone in improving clinical outcomes and reducing pain.

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