Y balance test has no correlation with the Stability Index of the Biodex Balance System

Gabriel Peixoto Leão Almeida; Isabel Oliveira Monteiro; Débora Fortes Marizeiro; Laísa Braga Maia; Pedro Olavo de Paula Lima

doi:10.1016/j.msksp.2016.11.008

Y balance test has no correlation with the Stability Index of the Biodex Balance System

Musculoskelet Sci Pract. 2017 Feb:27:1-6. doi: 10.1016/j.msksp.2016.11.008. Epub 2016 Dec 9.

Authors

Gabriel Peixoto Leão Almeida¹, Isabel Oliveira Monteiro², Débora Fortes Marizeiro³, Laísa Braga Maia⁴, Pedro Olavo de Paula Lima⁵

Affiliations

¹ Federal University of Ceará, Department of Physical Therapy, Alexandre Baraúna Street, 949, Fortaleza, CE, Brazil. Electronic address: gabriel_alm@hotmail.com.
² Federal University of Ceará, Department of Physical Therapy, Alexandre Baraúna Street, 949, Fortaleza, CE, Brazil. Electronic address: isabelom55@hotmail.com.
³ Federal University of Ceará, Department of Physical Therapy, Alexandre Baraúna Street, 949, Fortaleza, CE, Brazil. Electronic address: debora.fortes@hotmail.com.
⁴ Federal University of Ceará, Department of Physical Therapy, Alexandre Baraúna Street, 949, Fortaleza, CE, Brazil. Electronic address: asial123@hotmail.com.
⁵ Federal University of Ceará, Department of Physical Therapy, Alexandre Baraúna Street, 949, Fortaleza, CE, Brazil. Electronic address: pedrofisioterapia@hotmail.com.

PMID: 28637596
DOI: 10.1016/j.msksp.2016.11.008

Abstract

Study design: A cross-sectional study design.

Background: The Stability Index of the Biodex Balance System (SI-BBS) and Y Balance Test (YBT) has been used in studies assessing postural stability but no studies have verified the association of the YBT with the SI-BBS.

Objective: To analyze the association of the Y Balance Test (YBT) with the Stability Index of the Biodex Balance System (SI-BBS) to evaluate postural stability.

Methods: Forty participants who engaged in recreational physical activities, 12 of whom had a history of injury to the lower limbs. Was used the SI-BBS and the anterior, posterolateral, posteromedial, and composite measures of the YBT. The order of execution of the tests and of the lower limbs evaluated was randomized and blind tested by two evaluators.

Results: Pearson's correlation coefficient was used to check the strength of the relationship between the distances achieved on the YBT and the SI-BBS. The YBT showed excellent reliability in the anterior, posteromedial, and posterolateral directions. However, the YBT showed no statistically significant correlation with any variables in the SI-BBS, indicating poor validity between YBT and SI-BBS assessments of postural stability in people with and without history of lower limb injuries.

Conclusions: The results of this study showed the YBT is not correlated with the SI-BBS as an assessment of postural stability. This finding has implications for researchers and clinicians using YBT results as the only measure of postural stability.

Keywords: Biomechanics; Evaluation; Lower extremity; Postural balance.

MeSH terms

Adolescent
Adult
Biomechanical Phenomena
Cross-Sectional Studies
Exercise Test / methods*
Female
Humans
Male
Postural Balance / physiology*
Reproducibility of Results
Young Adult