Stand or sit. Position bent arm up to side; elbow bent shoulder height with wrist in front of elbow.
Lower wrist down/back as far as possible while keeping elbow directly lateral to shoulder. Repeat with opposite arm.
Wrist should be able to travel below transverse plane of shoulder. The distance wrist travels below shoulder or range of motion is noted for each side.
Elbow must be kept squarely lateral to shoulder for consistent assessment protocol. A mirror may help monitor proper form and assist in a more accurate assessment. Note any pain or discomfort during movement. See Shoulder Internal Rotation Inflexibility.