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. 2025 Mar 1;24(1):154-159.
doi: 10.52082/jssm.2025.154. eCollection 2025 Mar.

Reliability of Dynamic Balance Test with A Mobile Application of Physics Toolbox Suite

Erdem Atalay  1 , Ebru Turan Kızıldoğan  2
Affiliations

Reliability of Dynamic Balance Test with A Mobile Application of Physics Toolbox Suite

Erdem Atalay et al. J Sports Sci Med. .

Abstract

Although mobile applications are used as an alternative to expensive and difficult to access systems used to evaluate dynamic balance, existing applications have some shortcomings. This study aimed to evaluate the reliability of the Physics Toolbox Suite mobile application, which can obtain objective data for dynamic balance measurements in healthy adults, shorten the duration of measurements, and minimize the number of measurement equipment. The dynamic balance of 22 university students (9 male, 13 female, aged 20.3 (± 1.13 years)) was evaluated using the Physics Toolbox Suite mobile application in three test sessions with a 1-week interval. Anterior-posterior stability index (APSI), medial-lateral stability index (MLS), and overall stability index (OSI) of dynamic balance were calculated. Interclass Correlation Coefficients (ICC), Minimal Detectable Change (MDC), Standard Error of Measurement (SEM), and Coefficient of Variation for SEM (CVSEM) were evaluated as indicators of intra- and inter-rater reliability. The mean APSI, MLSI, and OSI scores (Standard deviation) were 2.59 (0.69), 2.21 (0.68), and 3.58 (0.94), respectively. In the evaluation made with the Physics Toolbox Suite mobile application, APSI scores had good intra-rater (ICC(3,1) = 0.67) and inter-rater reliability (ICC(3,1) = 0.73), MLSI scores had high intra-rater (ICC(3,1) = 0.90) with good inter-rater reliability (ICC(3,1) = 0.71), and OSI scores had high intra- rater (ICC(3,1) = 0.87) with good inter-rater reliability (ICC(3,1) = 0.73). The Physics Toolbox Suite Mobile Application can be used as a reliable objective tool to assess dynamic balance among healthcare professionals and athletes.

Keywords: Balance test; dynamic balance; reliability; smartphone application.

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Figures

Figure 1.
Figure 1.
Formulas of the anterior-posterior stability index (APSI), medial-lateral stability index (MLSI), and overall stability index (OSI).
Figure 2.
Figure 2.
Application interface and assessment procedure. A) Screenshot image of the Physics Toolbox Sensor Suite Mobile Application. B) Placement of the phone on the BOSU ball. C) Position of the participants on the BOSU ball.
Figure 3.
Figure 3.
Mean APSI, MLSI, OSI scores and Standard deviations. A) APSI= Anterior-posterior stability index. B) MLSI= Medial-lateral stability index. C) OSI = Overall stability index.
See this image and copyright information in PMC

References

    1. Akhbari B., Salavati M., Mohammadi F., Safavi-farokhi Z. (2015) Intra- and inter-session reliability of static and dynamic postural control in participants with and without patellofemoral pain syndrome. Physiotherapy Canada 67, 248-253.https://doi.org/10.3138/ptc.2014-51 10.3138/ptc.2014-51 - DOI - PMC - PubMed
    1. Alexander K. (2015) Instruments in your pocket. Mechanical Engineering 137, 42-45.https://doi.org/10.1115/1.2015-Sep-3 10.1115/1.2015-Sep-3 - DOI
    1. Amick R.Z., Chaparro A., Patterson J.A., Jorgensen M.J. (2015) Test-retest reliability of the sway balance mobile application. Journal of Mobile Technology in Medicine 4, 40.https://doi.org/10.7309/jmtm.4.2.6 10.7309/jmtm.4.2.6 - DOI
    1. Arnold B.L., Schmitz R.J. (1998) Examination of balance measures produced by the biodex stability system. Journal of Athletic Training 33, 323. - PMC - PubMed
    1. Beckerman H., Roebroeck M.E., Lankhorst G.J., Becher J.G., Bezemer P.D., Verbeek A.L.M. (2001) Smallest real difference, a link between reproducibility and responsiveness. Quality of Life Research 10, 571-578.https://doi.org/10.1023/a:1013138911638 10.1023/a:1013138911638 - DOI - PubMed

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