This study will compare shoulder range of motion assessment using the Kinect motion tracking system vs goniometer in patients with adhesive capsulitis (frozen shoulder) undergoing ultrasound-guided capsular distention procedures (standard of care).

The investigators hypothesize that, for shoulder adhesive capsulitis, the Kinect Motion Analysis 2.0 system will provide reliable results in a shorter and more efficient amount of time in comparison to traditional goniometer methods.

The study will be a single-center, investigator-initiated protocol to assess the reliability of the Kinect Motion Analysis 2.0 Motion Tracking System for Range Of Motion (ROM) assessment in patients with Shoulder Adhesive Capsulitis undergoing ultrasound guided capsular distention procedures (standard of care for adhesive capsulitis). Secondarily, the study will describe the relationship between range of motion of the shoulder girdle in the four quadrants of normalized reachable workspace by the Kinect 2.0, PROMIS person-reported outcome scores for pain, pain interference and function (general mobility and upper extremity function), and VAS pain scores.

Study participants are anticipated to remain in the study for 12 weeks: an initial visit followed by 6- and 12-week follow up visits. Given the nature of scheduling appointments in medical clinics, 12 weeks is an approximation; the actual duration may occasionally be 1-2 weeks longer if needed to successfully complete the follow-up visit.

The investigators hypothesize that, for shoulder adhesive capsulitis, the Kinect Motion Analysis 2.0 system will provide reliable results in a shorter and more efficient amount of time in comparison to traditional goniometer methods.

Inclusion Criteria:

1. diagnosis of limited ROM due to adhesive capsulitis
2. duration of symptoms of ≥ 3 months
3. persistent functional limitation (defined as either limitations occupationally, in independent activities of daily living, or activities of daily living)
4. X-rays and MRI excluding alternative diagnosis
5. age 18 years or older.

Exclusion Criteria:

1. prior shoulder surgery on the affected side
2. complete rotator cuff tear (based on clinical history, examination, and imaging) or planned surgical intervention on the affected side
3. ipsilateral subacromial injection within the last 3 months
4. autoimmune or rheumatologic disease affecting the joints
5. lack of scheduled same-day physical therapy appointment
6. inability to complete follow-up appointments or surveys
7. inability to provide informed consent
8. symptomatic glenohumeral or acromioclavicular pathology
9. referred pain from the neck or internal organs
10. generalized myofascial pain syndrome