Pain intensity will be measured with visual analog scale. Sonographic severity grade of shoulder impingement syndrome, serratus anterior muscle, upper trapezius and middle trapezius will be measured with USG in patients diagnosed with impingement and meeting the criteria and healthy volunteers.

Patients diagnosed with impingement and meeting the criteria will be included, while the healthy group will consist of hospital staff who do not have shoulder pain and who are not diagnosed with a shoulder-related disease. Pain intensity will be measured with VAS (visual analog scale), the sonographic severity grade of shoulder impingement syndrome, the serratus anterior muscle, the upper trapezius and the middle trapezius will be measured with USG.

Inclusion Criteria:

• 18-65 years
• Cognitive ability to understand test instructions
• Symptom duration longer than 1 month
• At least two positive Neer, Hawkins and painful arch tests

for healty volunteers

• 18-65 years
• cognitive ability to understand test instructions
• negative impingment test

Exclusion Criteria:

• Fibromyalgia
• cervical radiculopathy
• those who have received injections or physical therapy in the last month
• Those with a disorder that may affect shoulder joint range of motion and muscle mass (previous fracture, surgery, subluxation)
• BMI over 35
• inflammatory disease

Patients diagnosed with impingement and meeting the criteria will be included, while the healthy group will consist of hospital staff who do not have shoulder pain and who are not diagnosed with a shoulder-related disease.