title: Drop jump landing knee valgus angle; normative data in a physically active population.
abstract: OBJECTIVE
  Establish normative values for knee valgus angle during drop jump and step landings.
  
  
  METHODS
  Observational.
  
  
  METHODS
  University biomechanics laboratory.
  
  
  METHODS
  100 physically active asymptomatic individuals (50 male, 50 female) aged 18-28 years old.
  
  
  METHODS
  Knee valgus angle during drop jump and step landings.
  
  
  RESULTS
  There were no differences between genders during the step landing task (p < 0.12) but there were differences during the drop jump landing task (p < 0.048). Both males and females showed no significant differences between sides for either of the tasks (p > 0.05) or between the valgus angle generated for either of the tasks (p > 0.05).
  
  
  CONCLUSIONS
  It would appear in order to be regarded as an average "normal" performance during a drop jump landing task knee valgus angle should be symmetrical and in the range of 7-13 degrees for females and 3-8 degrees for males. For a unilateral step landing task knee valgus angle should be symmetrical and in the range of 5-12 degrees for females and 1-9 degrees for males.
authors.affiliation: Directorate of Sport, Exercise and Physiotherapy, Allerton Building, University of Salford, Manchester M6 6PU, UK. l.c.herrington@salford.ac.uk <l.c.herrington@salford.ac.uk>
authors.forename: Lee
authors.initials: L
authors.lastname: Herrington
authors.forename: Allan
authors.initials: A
authors.lastname: Munro
mesh_terms: D000293:Adolescent; D000328:Adult; D001696:Biomechanical Phenomena; D016001:Confidence Intervals; D005260:Female; D006801:Humans; D007719:Knee Joint / Q000502:physiology*; D008297:Male; D009043:Motor Activity / Q000502:physiology*; D010865:Pilot Projects; D011187:Posture / Q000502:physiology*; D016059:Range of Motion, Articular / Q000502:physiology*; D012016:Reference Values; D013177:Sports / Q000502:physiology*; D055815:Young Adult