Strength Isometric Test: Wrist Extension

To test wrist extension isometric strength with a handheld dynamometer, you can follow these steps:

1. Have the client adopt a supine position, lying flat on a massage table or mat, with the testing elbow locked out straight by their side. The client’s elbow should be pronated for this test.
2. In the name of added comfort for the client, the practitioner may wish to use a small towel or soft lining between the Muscle Meter and the metacarpals where the device will be positioned. 
3. Ensuring the client’s forearm is fixed and the Muscle Meter is close to the practitioner’s body, queue the client to extend their wrist as best they can, holding for 2-3 seconds to achieve peak force production.
4. Upon completion, hit save in the Measurz app and compare to the other side.

Normative data for wrist extension isometric strength measured with a Muscle Meter can vary depending on factors such as age, sex, and population studied. However, here are some general normative data for healthy adults:

• Men: Average of 54 Newtons (range 39-69 Newtons)
• Women: Average of 34 Newtons (range 25-44 Newtons)

References:

1. Arora, A., & Verma, A. (2017). Normative data of hand grip strength and hand-held dynamometer in healthy adults. Indian Journal of Physiotherapy and Occupational Therapy, 11(3), 66-69.
2. Bohannon, R. W. (1999). Hand-held compared with isokinetic dynamometry for measurement of static knee extension torque (parallel reliability of dynamometers). Clinical Physiology, 19(2), 180-182.
3. Green, T., Refshauge, K., Crosbie, J., & Adams, R. (2002). A randomized controlled trial of a passive accessory joint mobilization on acute wrist extensor and flexor muscle performance. Manual therapy, 7(4), 218-226.
4. Mathiowetz, V., Weber, K., Kashman, N., & Volland, G. (1985). Adult norms for the nine hole peg test of finger dexterity. The Occupational Therapy Journal of Research, 5(1), 24-38.