The goal of this randomized controlled trial is to evaluate the benefits from adding multimedia animations to a paper-based therapeutic exercise program in subjects with rotator cuff related shoulder pain. The main question[s] it aims to answer are:

• Does subjects improve more regarding shoulder disability and pain?
• Are the subjects more satisfied with the treatment received?
• Do the subjects adhere more to the exercise program?
• Do the subjects have greater expectations with the treatment received? Participants will perform a therapeutic exercise program within 6 months. Researchers will compare the addition of web-app animations to the classical paper-based information.

Inclusion Criteria:

• Presence of rotator cuff related shoulder pain, diagnosed as unilateral shoulder pain, located in the anterior and/or lateral deltoid region, which is reproduced by active elevation and/or lying on ipsilateral side, and with at least one the following orthopaedic tests: Neer, Hawkins-Kennedy and/or empty can.
• Pain lasting from at least 3-months.
• Pain intensity at rest, during movement, and sleeping ≥ 3/10 points on a numeric pain rating scale.
• To have a mobile phone, tablet or computer with internet connection.
• To understand written and spoken Spanish language.

Exclusion Criteria:

• History of major trauma or surgery on the shoulder, elbow, or cervical spine.
• Signs of other shoulder pathologies such as instability, frozen shoulder, calcific tendonitis, severe arthrosis, or neuralgic amyotrophy.
• Presence of full-thickness rotator cuff tears on ultrasound imaging.
• Signs and/or symptoms of neck-related shoulder pain and/or radiculopathy or radicular pain.
• Systemic diseases such as cancer, rheumatic disorders, sclerosis multiple, neurological disorders, etc.
• Severe psychiatric disorders.

The investigators involved in the recruitment, and data analysis will be masked of participant's allocation group.