title: Gesture standardization increases the reproducibility of 3D kinematic measurements of the knee joint.
abstract: BACKGROUND
  The literature on the 3D kinematics of the knee suggests that the gesture accomplished during kinematic assessment might play a significant role in the values measured. The purpose of this study is to demonstrate that a standardized gesture leads to an increased reproducibility in 3D kinematic measurements of the knee.
  
  
  METHODS
  Seventeen healthy male subjects performed series of knee-bends in standardized and unconstrained conditions while their left knee's 3D kinematics were recorded using an optical motion-recording system. Standardized knee-bends were performed in a specially designed structure stabilizing the shoulders, pelvis and feet. Coefficient of multiple correlation were calculated for the ascent and the descent phases of the knee-bends for the tibial rotation and abduction/adduction components of the knee movement.
  
  
  RESULTS
  Comparisons between coefficient of multiple correlation of the different gesture conditions showed a statistically significant increase in reproducibility for the tibial rotation during the standardized knee-bends.
  
  
  CONCLUSIONS
  It appears that gesture standardization is an interesting option to consider for precise kinematic assessment of the living human knee.
authors.affiliation: Programme d'orthopédie Edouard-Samson, Université de Montréal, Montréal, Canada. fredlavoie@hotmail.com
authors.forename: Frédéric
authors.initials: F
authors.lastname: Lavoie
authors.forename: Martin
authors.initials: M
authors.lastname: Laplante
authors.forename: Gerald
authors.initials: G
authors.lastname: Parent
authors.forename: Nicolas
authors.initials: N
authors.lastname: Duval
authors.forename: Sylvie
authors.initials: S
authors.lastname: Doré
authors.forename: Jacques A
authors.initials: JA
authors.lastname: de Guise
mesh_terms: D000328:Adult; D001696:Biomechanical Phenomena / Q000379:methods* / Q000592:standards*; D005868:Gestures; D006801:Humans; D007719:Knee Joint / Q000502:physiology*; D008297:Male; D009068:Movement / Q000502:physiology*; D016059:Range of Motion, Articular / Q000502:physiology*; D012016:Reference Values; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013647:Task Performance and Analysis