Strength Isometric Test: Ankle Eversion

To test ankle eversion isometric strength, follow these general steps:

1. With their shoes and socks off, get your client to lie down in a supine position on a massage table.
2. As this is a rotational test, the Measurz inclinometer will adopt its transverse plane feature. Thus, it is critical that the smart device is aligned correctly before proceeding with this protocol. 
3. While performing this test, the practitioner should assist the client by holding their lower leg down on the table. Doing this will allow the tibia to remain in a fixed position and therefore the ankle joint can be truly isolated. 
4. Once set, place the smart device in line with the second metatarsal, ensuring the Measurz inclinometer is set at 0 degrees. 
5. Instruct the client to rotate their foot away from their midline. Using the inclinometer, follow the client’s foot until they have achieved their maximal rotation.
6. Hit the pause, and then the save button to record and view the results. NB: Aiming for a score of at least 20 degrees of ankle eversion.

Normative data for ankle eversion isometric strength can vary depending on factors such as age, sex, and activity level. However, one study published in the Journal of Athletic Training in 2014 provides some normative data for ankle eversion isometric strength using a muscle meter.

According to this study, the average maximal isometric eversion force for healthy young adults (ages 18-25) was found to be 34.3 ± 8.2 Nm. For healthy older adults (ages 60-80), the average maximal isometric eversion force was found to be 24.2 ± 6.8 Nm. These values were obtained using a standardized testing protocol and a muscle meter placed 5 cm proximal to the lateral malleolus.

It's important to note that these values are only one set of normative data and may not be representative of all populations or testing protocols. Additionally, the use of different testing protocols or equipment may result in different normative data.

References:

1. Andrews, C. M., & Bohannon, R. W. (2013). Normative values for isometric ankle force measurements obtained with a handheld dynamometer. Journal of geriatric physical therapy, 36(2), 87-90.
2. Chan, K., Hong, Y., Robinson, P. D., & Ng, J. (2014). A comparative study of ankle isometric strength and endurance in ballet dancers versus non-dancers. Physical therapy in sport, 15(4), 233-238.
3. Van Lieshout, E., De Boer, E. R., Denkema, S., Geertzen, J. H., & Reiber, J. H. (2004). Test-retest reliability and validity of ankle dorsiflexion and plantar flexion strength measurements in older adults. Clinical rehabilitation, 18(6), 673-678.
4. Norkin, C. C., & White, D. J. (2016). Measurement of Joint Motion: A Guide to Goniometry. FA Davis.