PEMF Therapy in Shoulder Tendinopathy

Inclusion Criteria: * Adults aged between 18 and 70 years. * Patients with chronic shoulder pain lasting more than 3 months, of non-traumatic origin, persistent despite prior conservative treatment. * Clinical diagnosis of shoulder tendinopathy and/or subacromial pain syndrome based on medical history and physical examination. * Presence of shoulder pain and functional limitation confirmed by clinical assessment and baseline functional evaluation (SPADI). * Ability to comply with the treatment protocol and attend scheduled follow-up assessments. * Provision of written informed consent prior to participation. Exclusion Criteria: * Full-thickness rotator cuff tears with surgical indication. * Recent major shoulder trauma (within the last 6 months). * Active systemic inflammatory or rheumatologic diseases. * Presence of metallic implants in the treatment area or implanted electronic devices (e.g., pacemaker). * Neurological disorders affecting the upper limb. * Contraindications to balneotherapy (e.g., severe cardiovascular disease, renal failure, severe dermatological conditions). * Decompensated chronic diseases at the time of enrollment (cardiovascular, hepatic, renal, respiratory, or neurological). * Skin lesions at the site of treatment application. * Pregnancy or breastfeeding. * Active neoplastic disease. * Decompensated psychiatric disorders. * History of hypersensitivity to natural therapeutic factors used in balneotherapy. * Refusal to participate or inability to provide informed consent.