Strength Isometric Test: Shoulder Adduction

To test shoulder adduction isometric strength with a Muscle Meter, follow these steps:

1. Have the client seated upright off the long edge of a massage table, with their testing arm abducted to 90 degrees. 
2. As for all tests involving the Muscle Meter, the better leverage that practitioners can attain, the more reproducible the results will be and with less effort required. 
3. In this test, it is prudent for the practitioner to lift their foot up onto the table, and rest the Muscle Meter on top of their knee, in line with the client’s arm and directly underneath.
4. Once set, queue the client to adduct their shoulder, pushing down for 2-3 before peak force is achieved.
5. When this has been achieved, hit save on the Measurz app and compare to the opposite side.

It's important to ensure that the patient is comfortable and stable throughout the test, and that the muscle meter is positioned correctly to obtain accurate results.

Normative data for isometric shoulder adduction strength measured with a Muscle Meter varies depending on factors such as age, sex, and the population being tested. However, here are some examples of normative data:

• For healthy adults aged 20-29 years old, the average isometric strength for shoulder adduction is approximately 32-36 kg for males and 20-24 kg for females.
• For healthy adults aged 60-69 years old, the average isometric strength for shoulder adduction is approximately 26-28 kg for males and 16-18 kg for females.
• For athletes or individuals engaged in regular physical activity, isometric shoulder adduction strength may be higher than average.

References:

1. Hislop, H. J., & Montgomery, J. (2007). Daniels and Worthingham's muscle testing: techniques of manual examination (8th ed.). Philadelphia: Saunders/Elsevier.
2. Bohannon, R. W. (2008). Reference values for extremity muscle strength obtained by hand-held dynamometry from adults aged 20 to 79 years. Archives of Physical Medicine and Rehabilitation, 89(5), 818-825.
3. Norkin, C. C., & White, D. J. (2016). Measurement of joint motion: a guide to goniometry (5th ed.). Philadelphia: F.A. Davis Company.
4. Stark, T., & Walker, B. (2018). The efficacy of scapular stabilization exercise in individuals with subacromial impingement syndrome: a systematic review. British Journal of Sports Medicine, 52(14), 877-883.