title: Postural sway changes during pregnancy: a descriptive study using stabilometry.
abstract: OBJECTIVE
  This study aims to analyse changes in body sway over the course of pregnancy.
  
  
  METHODS
  This is a descriptive study in which stabilometric tests were applied at three stages of pregnancy and with a combination of different visual conditions (eyes open/closed) and support base configuration (feet together/apart). Twenty healthy pregnant women participated in the study. Changes in postural control with pregnancy were analysed via the elliptical area of the stabilograms and spectral analysis of the displacements of the centre of pressure (COP) along the lateral and anterior/posterior directions.
  
  
  RESULTS
  The elliptical area encompassing the COP significantly increased over the course of the pregnancy for the feet apart and eyes closed test protocols. The spectral analysis revealed a significant increase of COP oscillations along the anterior-posterior direction when subjects stood with the eyes open/feet together and feet apart. A reduction (significant) of the lateral oscillations of COP was observed for the eyes open/feet together protocol.
  
  
  CONCLUSIONS
  Pregnancy induced significant changes in the postural control when pregnant women stood with a reduced support base or with eyes closed.
authors.affiliation: Sport and Physical Education School, Federal University of Rio de Janeiro, 21941-590 Rio de Janeiro, Brazil. liliam@eefd.ufrj.br
authors.forename: Liliam F
authors.initials: LF
authors.lastname: Oliveira
authors.forename: Taian M M
authors.initials: TM
authors.lastname: Vieira
authors.forename: Adriana R
authors.initials: AR
authors.lastname: Macedo
authors.forename: David M
authors.initials: DM
authors.lastname: Simpson
authors.forename: Jurandir
authors.initials: J
authors.lastname: Nadal
mesh_terms: D000058:Accidental Falls / Q000517:prevention & control; D000328:Adult; D001416:Back Pain / Q000517:prevention & control; D001696:Biomechanical Phenomena; D015992:Body Mass Index; D005260:Female; D006801:Humans; D015999:Multivariate Analysis; D004856:Postural Balance / Q000502:physiology*; D011187:Posture / Q000502:physiology*; D011247:Pregnancy / Q000502:physiology*; D011434:Proprioception / Q000502:physiology; D014796:Visual Perception / Q000502:physiology