Magnifying the Scale of Visual Biofeedback Improves Posture

Deborah A. Jehu, Jérémie Thibault, Yves Lajoie

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


Biofeedback has been shown to minimize body sway during quiet standing. However, limited research has reported the optimal sensitivity parameters of visual biofeedback related to the center of pressure (COP) sway. Accordingly, 19 young adults (6 males; 13 females; aged 21.3 ± 2.5) stood with feet together and performed three visual biofeedback intensities [unmodified biofeedback (UMBF), BF magnified by 5 (BF5), BF magnified by 10 (BF10)], along with control trials with no biofeedback (NBF). The participants were instructed to stand as still as possible while minimizing the movements of the visual target. The findings revealed that UMBF produced significantly greater COP displacement in both the anterior–posterior (AP) and medial–lateral directions, as well as greater standard deviation of the COP in the AP direction (p < 0.05). Additionally, NBF showed significantly greater 95 % area ellipse than the UMBF, BF5, and BF10 intensities (p < 0.001). Therefore, the most sensitive COP scales generated the least amount of postural sway. However, there were no significant differences on any of the COP measures between BF5 and BF10. This research provides insight with respect to the proper scale on which biofeedback should be given in order to improve postural control (i.e., BF5 or BF10).

Original languageEnglish (US)
Pages (from-to)151-155
Number of pages5
JournalApplied Psychophysiology Biofeedback
Issue number2
StatePublished - Jun 1 2016
Externally publishedYes


  • Center of pressure
  • Posture
  • Scale magnification
  • Visual biofeedback

ASJC Scopus subject areas

  • Neuropsychology and Physiological Psychology
  • Applied Psychology


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