Range of Motion: Shoulder External Rotation 90 deg

Procedure:

To test Shoulder External Rotation 90 deg range of motion with an inclinometer, follow these steps:

1. Have the client start in a seated or standing position. 
2. Then, have the client abduct their shoulder to 90 degrees, and flex their elbow to 90 degrees also.
3. Next, align the Measurz inclinometer with the midway point of the forearm and instruct the client to externally rotate their forearm up back and upward as far as they can go. Make sure the client keeps their shoulder and elbow in the same position as they perform this test.
4. Once maximal range of motion is achieved, press the pause, and then the save button to view the results. NB: Should be aiming for at least 90 degrees worth of shoulder external rotation from this 90 degree starting position.

The normal range of motion for Shoulder External Rotation 90 degrees can vary depending on factors such as age, sex, and physical activity levels. However, we should be aiming for at least 90 degrees worth of shoulder external rotation from this 90 degree starting position.

References:

1. Norkin CC, White DJ. Measurement of Joint Motion: A Guide to Goniometry. 4th ed. Philadelphia, PA: F.A. Davis Company; 2009.
2. Magee DJ. Orthopedic Physical Assessment. 6th ed. St. Louis, MO: Elsevier Health Sciences; 2013.
3. Kendall FP, McCreary EK, Provance PG, Rodgers MM, Romani WA. Muscles: Testing and Function, with Posture and Pain. 5th ed. Baltimore, MD: Lippincott Williams & Wilkins; 2005.