Citation

Słomka KJ, Michalska J, Marszałek W, Bacik B, Juras G. MethodsX 2020; 7: 10-16.

Affiliation

Institute of Sport Sciences, Department Human Motor Behavior, The Jerzy Kukuczka Academy of Physical Education, Katowice, Poland.

Copyright

(Copyright © 2020, Elsevier Publishing)

DOI

10.1016/j.mex.2019.11.029

PMID

31890643

PMCID

PMC6931099

Abstract

Functional stability has been studied in diverse populations, yet the possibility to compare the results across them and the knowledge about actual performance referenced to the maximum capacity is limited. Our aim was to improve the functional limits of stability testing and introduced Forward Functional Stability Indicator (FFSI) as a reliable measure of functional stability. The study participants were not able to cross the projected forward anatomical stability limit (FASL). It is located at the level of first metatarsophalangeal joints and should be considered a mechanical limit of the maximal voluntary centre of foot pressure (COP) excursion (MVE). It was only true when the whole feet were in contact with the ground. There were statistically significant differences in limits of stability (LOS) test results in the conditions when the heels were raised and the toes muscles were contracted isometrically. The proposed forward functional stability indicator (FFSI) is a highly reliable measure of functional stability, which provides information about the actual performance with reference to maximum capacity and is easy to compare across normal and clinical populations. •The proposed forward functional stability indicator (FFSI) is a highly reliable measure of functional stability.•FFSI provides information about the actual performance with reference to maximum capacity and is easy to compare across normal and clinical populations.•The forward anatomical stability limit (FASL) is located at the level of first metatarsophalangeal joints and should be considered a mechanical limit of the maximal voluntary centre of pressure (COP) excursion when certain measurement criteria are met.

© 2019 The Author(s).

Language: en

Keywords

Balance; Foot antropometry; Forward Functional Stability Indicator (FFSI); Forward anatomical stability limit