title: Reliability of center of pressure distance and area sway measurement during one-legged stance in a normal population.
abstract: OBJECTIVE
  The objective of this study was to assess the reliability of center ofpressure distance and area sway during one-legged stance.
  
  
  METHODS
  One hundred and sixteen participants aged 40-60 years old were recruited. Fifty nine subjects were males and fifty seven subjects were females. Subjects were excluded in cases of abnormal lower extremity structures, neurological deficits related to balance disorder, and inability of right leg stance for more than 30 seconds. All subjects were evaluated with 4 trials ofone-legged stance, each 2 of normal and fast lifting leg conditions. Center of pressure and kinematic data were synchronously collected.
  
  
  RESULTS
  Intraclass correlation coefficients (ICC) of the distance sway was between 0.69 and 0.83, while ICC of the area sway was between 0.06 and 0.25.
  
  
  CONCLUSIONS
  Distance sway provides higher reliability than area sway for static balance assessment. Subjective leg lifting speed was satisfactory.
authors: Department of Physiology, Faculty of Medicine, Chulalongkorn University, Bangkok 10330, Thailand.
authors: Pasakorn
authors: P
authors: Watanatada
authors: Burawan
authors: B
authors: Polmang
authors: Sompol
authors: S
authors: Sanguangrangsirikul
mesh_terms: D000328:Adult; D005260:Female; D006801:Humans; D007866:Leg / Q000502:physiology*; D008297:Male; D008875:Middle Aged; D004856:Postural Balance / Q000502:physiology*; D011187:Posture / Q000502:physiology*; D011312:Pressure; D015203:Reproducibility of Results