Does hand size affect the test results?

No, hand size does not affect Eforto® test results. The Eforto® system is validated using bulb size 5, and all normative data are based on this standard size.

Research has shown that the Vigorimeter (used by Eforto®) is unaffected by hand geometry, meaning that measurements remain accurate regardless of hand size or shape. This makes the Eforto® Device a more reliable tool for assessing grip strength across diverse populations compared to traditional dynamometers, which can be influenced by anatomical differences.

Reference:
Lee et al., 2024. Reliability and Validity of the Martin Vigorimeter for Grip Strength Measurement in Korean Adults. Reliability & Validity Study. DOI: 10.4055/cios23383