Strength Isometric Test: Ankle Dorsiflexion

To test ankle dorsiflexion isometric strength with a Muscle Meter, you would typically follow these steps:

1. Have the client adopt a supine position, lying down on a table with their shoes and socks off. 
2. Ensure the foot being tested starts in a neutral position, with roughly 10 degrees of plantar flexion. 
3. To increase comfortability, place a small towel or soft lining between the Muscle Meter and the superior of the client’s foot. Ensure the press pad surface of the Muscle Meter is directed toward the client’s foot.
4. While creating leverage through keeping the Muscle Meter close to the practitioner’s body, queue the client to pull their foot up as hard as they can and have them hold for 2-3 seconds.
5. Save the results on the Measurz app, and compare to the opposite side.

The normative data for ankle dorsiflexion isometric strength varies depending on the population being tested and the specific testing protocol used. However, here are a few examples of normative data reported in the literature:

• In a study of healthy young adults (mean age 22 years), the average dorsiflexion strength measured with a handheld dynamometer was 200 N (range 160-237 N) for men and 119 N (range 95-147 N) for women (Bohannon and Tiberio, 1994).
• Another study of healthy young adults (mean age 21 years) reported dorsiflexion strength values of 228 N (SD 76 N) for men and 120 N (SD 29 N) for women (Mentiplay et al., 2015).
• In a study of healthy older adults (mean age 73 years), the average dorsiflexion strength measured with a handheld dynamometer was 122 N (range 89-166 N) for men and 81 N (range 61-102 N) for women (Bohannon and Tiberio, 1994).

It's important to note that these normative values are just examples and may not be applicable to all populations or testing protocols.

References:

1. Bohannon RW, Tiberio D. Normal hand-held isometric strength measurements in middle-aged and elderly Americans. Am J Occup Ther. 1994;48(6):493-8. doi: 10.5014/ajot.48.6.493. PMID: 8202751.
2. Mentiplay BF, Perraton LG, Bower KJ, Adair B, Pua YH, Williams GP, McGaw R, Clark RA. Assessment of lower limb muscle strength and power using hand-held and fixed dynamometry: a reliability and validity study. PLoS One. 2015;10(10):e0140822. doi: 10.1371/journal.pone.0140822. PMID: 26460595; PMCID: PMC4608735.