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Dynamic Balance Evaluation

Reliability and Validity of a Computerized Wobble Board

Fusco, Andrea1,2; Giancotti, Giuseppe Francesco1; Fuchs, Philip X1,2; Wagner, Herbert2; Varalda, Carlo3; Capranica, Laura4; Cortis, Cristina1

The Journal of Strength & Conditioning Research: February 22, 2018 - Volume Publish Ahead of Print - Issue - p
doi: 10.1519/JSC.0000000000002518
Original Research: PDF Only

Computerized Wobble Boards (WB) are inexpensive, transportable and user-friendly devices to objectively quantify the dynamic balance performances out of laboratory settings, although it has not been established if they are reliable and valid tools. Therefore, the purpose of this study was to determine the reliability and validity of a computerized WB. Thirty-nine (18 female, 21 male) young adults (age: 23.3±2.1years; body mass: 65.9±1.8kg; height: 168.2±8.8cm; leg length: 78.8±5.7cm; BMI: 23.2±2.1kg·m-2) participated in the study. Subjects were assessed during three separate sessions on different days with a 48h rest in between. A total number of two WB single limb tests and one Y Balance Test (YBT) were performed. The WB performance was registered using the proprietary software and represented by the time spent in the target zone, which represented the 0° tilt angle measured by the tri-axial accelerometer in the WB. YBT normalized reach distances were recorded for the anterior, posteromedial and posterolateral directions. Intraclass correlation coefficient, 95% confidence interval, standard error of measurement, minimal detectable change and Bland-Altman plots were used to evaluate intrasession and intersession reliability, while Pearson product moment correlation was used to determine concurrent validity. Reliability ranged from fair to excellent, showing acceptable levels of error and low minimal detectable change. However, all correlation coefficients between WB and YBT outcomes were poor. Despite the two methods addressing different aspects of balance performance, WB seems to validly serve its purpose and showed good reliability. Therefore, computerized WBs have the potential to become essential devices for dynamic balance assessment.

1Department of Human Sciences, Society and Health, University of Cassino e Lazio Meridionale, Italy

2Department of Sports Science and Kinesiology, University of Salzburg, Austria

3Italian Weightlifting Federation FIPE, Rome, Italy

4Department of Movement, Human and Health Sciences, University of Rome Foro Italico, Italy

Corresponding author: Cristina Cortis, PhD Via S. Angelo - Località Folcara 03043 Cassino (FR), Italy Tel: +39 0776 299 4436 Fax: +39 0776 299 3839 e-mail:

Laboratory: Sport and Exercise Physiology “Marco Marchetti”, Department of Human Sciences, Society and Health, University of Cassino e Lazio Meridionale, Italy

No funds were received for this work from any of the following organizations: National Institutes of Health (NIH); Wellcome Trust; Howard Hughes Medical Institute (HHMI); and other(s).

Copyright © 2019 by the National Strength & Conditioning Association.