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Short-Term Repeatability of Stabilometric Assessments.

Nicola Lovecchio¹, Matteo Zago¹, Laura Perucca^2,3

¹a Functional Anatomy Research Center (FARC), Department of Biomedical Sciences for Health, Università degli Studi di Milano , Milano , Italy.

Journal of Motor Behavior

|June 25, 2016

Summary

Center of pressure (COP) displacements showed good within-day repeatability but significant between-day variations. For consistent results, COP assessments should be conducted within the same testing session.

Keywords:

COP balance repeatability sway

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Area of Science:

Biomechanics
Neurology
Human Movement Science

Background:

Center of pressure (COP) analysis is crucial for assessing postural control and balance.
Understanding the repeatability of COP measures is essential for reliable clinical and research applications.
Short-term variability in COP displacements can impact the interpretation of balance assessments.

Purpose of the Study:

To evaluate the short-term repeatability of center of pressure (COP) displacements.
To assess the influence of eye condition (open vs. closed) and testing day on COP sway area and speed.
To determine the optimal conditions for reproducible COP measurements.

Main Methods:

Ten healthy adults participated in the study.
COP sway area and speed were measured in the morning and afternoon across two separate days.
Testing included both eyes open (EO) and eyes closed (EC) conditions.
Statistical analysis employed ANOVA and Bland-Altman plots to assess agreement and variability.

Main Results:

Significant differences in COP displacements were found between eye conditions (EO/EC) and testing days.
The eyes closed (EC) condition and the second testing day yielded larger COP displacement values.
COP speed demonstrated better agreement than COP area across conditions.
Time of day did not significantly affect COP displacements.

Conclusions:

Center of pressure (COP) displacements exhibit good within-day reproducibility.
Significant between-day variations in COP displacements necessitate careful consideration in study design.
For reliable COP assessments, it is recommended to conduct measurements within the same testing session.