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Foam pads properties and their effects on posturography in participants of different weight

Fagan, Michael; Gosselin, Guy

Authors

Guy Gosselin

Abstract

Background: Foam pads are increasingly used on force platforms during balance assessments in order to produce increased instability thereby permitting the measurement of enhanced posturographic parameters. A variety of foam pads providing different material properties have thus been used, although it is still unclear which characteristics produce the most effective and reliable tests. Furthermore, the effects of participant bodyweight on the performance of the foam pads and outcome of the test are unknown. This project investigated how different foam samples affected postural sway velocity in participants of different weights. Method: Four foam types were tested according to a modified American Society for Testing and Materials standard method for testing flexible cellular materials. Thirty-six healthy male factory workers divided into three groups according to body mass were tested three times for each of the 13 randomly-selected experimental situations for changes in postural sway velocity in this cross-over study. Descriptive and inferential statistics were used to compare the results and evaluate the difference in sway velocity between mass groups. Results: For the materials considered here, the modulus of elasticity of the foam pads when compressed by 25% of their original heights was inversely proportional to their density. The largest changes in postural sway velocity were measured when the pads of highest stiffness were used, with memory foam pads being the least likely to produce significant changes. Conclusions: The type of foam pads used in posturography is indeed important. Our study shows that the samples with a higher modulus of elasticity produced the largest change in postural sway velocity during quiet stance. The results suggest that foam pads used for static computerised posturography should 1) possess a higher modulus of elasticity and 2) show linear deformation properties matched to the participants’ weight.

Journal Article Type Article
Publication Date 2015-02
Journal Chiropractic & manual therapies
Print ISSN 2045-709X
Electronic ISSN 2045-709X
Publisher Springer Verlag
Peer Reviewed Peer Reviewed
Volume 23
Issue 2
Article Number ARTN 2
Institution Citation Fagan, M., & Gosselin, G. (2015). Foam pads properties and their effects on posturography in participants of different weight. Chiropractic & manual therapies, 23(2), https://doi.org/10.1186/s12998-014-0045-4
DOI https://doi.org/10.1186/s12998-014-0045-4
Keywords Balance, Foam pads, Posturography, Modulus of elasticity, Biomechanics
Publisher URL http://www.chiromt.com/content/23/1/2
Copyright Statement © 2015 Gosselin and Fagan; licensee BioMed Central. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.
Additional Information Copy of article first published in: Chiropractic & manual therapies, 2015, v.23, issue 2.

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Copyright Statement
© 2015 Gosselin and Fagan; licensee BioMed Central. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.




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