What is the normal active shoulder internal rotation range?

• A. 70-80 degrees
• B. 50-60 degrees
• C. 90-100 degrees
• D. 30-40 degrees

Answer: (A)

Internal rotation of the shoulder refers to how far the forearm can rotate inward toward the body, usually measured with the arm positioned at 90 degrees of abduction and the elbow flexed to 90 degrees. In a healthy adult, this active range is typically around 70 to 90 degrees. The value of 70–80 degrees fits well within that normal range, making it the best choice. The other options are either below the typical normal (30–40, 50–60) or exceed what most people can actively achieve (90–100). Individual variation exists, but 70–80 is a common, reasonable benchmark for normal active internal rotation.