Intrasubject Variability of Selected Force-Platform Parameters in the Quantification of Postural Control
Abstract
Platform stabilometry is increasingly applied to monitor or re-educate standing balance in clinical rehabilitation. Consequently, insight is needed into the validity, reliability, and sensitivity of different force-platform parameters. This study focuses on the intrasubject variability as the major source of variance (unreliability) in the study of human motor skills. The intrasubject variability of several, commonly applied force-platform parameters was determined across ten repeated tests of quiet two-legged standing in healthy subjects to identify the most consistent and stable parameters in the quantification of postural control. The variability of the root mean square (RMS) amplitude, peak-to-peak amplitude, mean frequency, and RMS velocity of the fore-aft and lateral components of the center-of-pressure fluctuations was investigated under varying (visual and cognitive) task conditions. The results indicate that all selected parameters show considerable intrasubject variability irrespective of the task context. Nonetheless, both the RMS amplitude and RMS velocity in either direction of sway do not demonstrate a significant trend across repeated tests. Among the selected parameters, the RMS velocity in the fore-aft direction shows the greatest intrasubject consistency, as well as a high sensitivity to, for example, visual deprivation. These findings support the reliability and validity of this parameter in the clinical quantification of postural control.
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Asymmetry does not necessarily imply decreased postural control and higher risks of falls.
“In other words, asymmetry does not necessarily imply decreased postural control and higher risks of falls.73,74”
From The Effectiveness of the Bobath Concept in Stroke Rehabilitation: What is the Evidence? (2009) · cites this paper as [73]
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- Authors
- Geurts, A. C. H., Nienhuis, B., & Mulder, T. W.
- Affiliations
- Sint Maartenskliniek (NL)
- Venue
- Archives of Physical Medicine and Rehabilitation
- Publisher
- Elsevier BV
- Published
- 1993-11
- Volume
- 74
- Issue
- 11
- Pages
- 1144-1150
- ISSN
- 0003-9993 (ISSN-L)
- OpenAlex
- W2400239684
- Cited by
- 295
- References
- 34
- Citations by year
- 2026: 2 · 2025: 3 · 2024: 6 · 2023: 10 · 2022: 8 · 2021: 10 · 2020: 13 · 2019: 13 · 2018: 17 · 2017: 15 · 2016: 7 · 2015: 17 · 2014: 11 · 2013: 17 · 2012: 17
- FWCI
- 11.77
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Archives of Physical Medicine and Rehabilitation (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Health Sciences › Health Professions › Physical Therapy, Sports Therapy and Rehabilitation › Balance, Gait, and Falls Prevention
- Life Sciences › Neuroscience › Cognitive Neuroscience › Motor Control and Adaptation
- Health Sciences › Medicine › Rehabilitation › Stroke Rehabilitation and Recovery
- Keywords
- within-person variability, postural control, standing balance, sway velocity, sway amplitude, visual deprivation, cognitive load, reliability statistics, validity, rehabilitation
- MeSH terms
- Adult, Aged, Postural Balance, Female, Humans, Male, Middle Aged, Models, Biological, Posture, Reproducibility of Results
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