Which type of mobility is decreased in "frozen shoulder"?

In the condition known as "frozen shoulder," or adhesive capsulitis, both active and passive shoulder mobility are significantly decreased. This condition typically presents with a progressive loss of motion in the shoulder due to inflammation and stiffening of the joint capsule.

Active shoulder mobility refers to the range of motion that a person can achieve independently by using their muscles. In "frozen shoulder," individuals struggle to move their shoulders actively due to pain and stiffness.

Passive shoulder mobility, which involves movement of the shoulder joint while someone else or a device assists, is also restricted. When a clinician attempts to move the shoulder through its range of motion, the resistance caused by the adhesive nature of the joint capsule and the pain experienced by the patient limits this mobility as well.

Together, these limitations contribute to a hallmark characteristic of frozen shoulder: the significant reduction in both active and passive movements of the shoulder, which can severely impact daily activities and quality of life. Thus, the condition is marked by a dual decrease in mobility, making both types affected.