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Effects of increased anterior-posterior voluntary sway frequency on mechanical and perceived postural stability

Lorenzo, TM and Vanrenterghem, J (2014) Effects of increased anterior-posterior voluntary sway frequency on mechanical and perceived postural stability. HUMAN MOVEMENT SCIENCE, 39. pp. 189-199. ISSN 0167-9457

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Despite a substantial number of studies, the interaction between mechanical indicators of stability and perception of instability remains unclear. The purpose of this study was to determine the effect of sway frequency and verbal restraint on mechanical and perceived postural stability. Fourteen participants underwent a series of standing voluntary anterior-posterior swaying trials at three frequencies (20, 40, and 60 bpm) and two levels of restraint (non restraint and verbally restraint to swaying at the ankle). Repeated measures ANOVA tests revealed greater mechanical stability defined though the margin of stability, and greater horizontal ground reaction forces, while the centre of pressure excursions remained unchanged with increasing frequency. Furthermore, ground reaction forces were greater in the non-restraint condition. Moreover, a tendency toward greater perceived instability with increasing voluntary sway frequency was observed..Our results indicate that variations in sway frequency and verbal restraint resulted in noticeable alterations in mechanical indicators of stability, with no clear effect on perceived instability.

Item Type: Article
Uncontrolled Keywords: 09 Engineering, 11 Medical And Health Sciences, 17 Psychology And Cognitive Sciences
Subjects: B Philosophy. Psychology. Religion > BF Psychology
R Medicine > RA Public aspects of medicine
T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Sport & Exercise Sciences
Publisher: Elsevier
Related URLs:
Date Deposited: 05 Aug 2015 14:49
Last Modified: 04 Sep 2021 14:05
DOI or ID number: 10.1016/j.humov.2014.11.012
URI: https://researchonline.ljmu.ac.uk/id/eprint/1798
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