title: Interlimb asymmetry in persons with and without an anterior cruciate ligament deficiency during stationary cycling.
abstract: OBJECTIVE
  To investigate the power output generation from anterior cruciate ligament (ACL)-injured and noninjured limbs during stationary cycling.
  
  
  METHODS
  Repeated measures.
  
  
  METHODS
  Research laboratory.
  
  
  METHODS
  Ten people with unilateral ACL deficiency and 10 uninjured controls matched for age and sex.
  
  
  METHODS
  Participants performed 6 randomized bouts of stationary cycling at intensities of 2 cadences (60, 90 rpm) and 3 power outputs (75, 125, 175 W) for approximately 2 minutes for each bout during a single laboratory visit.
  
  
  METHODS
  The effective component of force (perpendicular to the crank) was measured and used to calculate the power output contribution from each limb to the total power output.
  
  
  RESULTS
  Subjects with ACL injury generated significantly more power from uninjured limbs compared with that from injured limbs and the limbs of control subjects.
  
  
  CONCLUSIONS
  Results suggest that people with ACL injury have a reduced total output from the injured limb and rely on the uninjured limb for most of the power output. This may compromise the ability to restore lower-limb muscle strength after injury.
authors.affiliation: School of Human Kinetics, University of British Columbia, Vancouver, BC, Canada.
authors.forename: Michael A
authors.initials: MA
authors.lastname: Hunt
authors.forename: David J
authors.initials: DJ
authors.lastname: Sanderson
authors.forename: Hélène
authors.initials: H
authors.lastname: Moffet
authors.forename: J Timothy
authors.initials: JT
authors.lastname: Inglis
mesh_terms: D000704:Analysis of Variance; D000070598:Anterior Cruciate Ligament Injuries; D001642:Bicycling / Q000502:physiology; D001696:Biomechanical Phenomena; D016022:Case-Control Studies; D005080:Exercise Test / Q000379:methods; D005081:Exercise Therapy / Q000379:methods; D005163:Factor Analysis, Statistical; D005260:Female; D007839:Functional Laterality; D006801:Humans; D007718:Knee Injuries / Q000150:complications / Q000503:physiopathology* / Q000534:rehabilitation; D007866:Leg / Q000503:physiopathology*; D008297:Male; D018908:Muscle Weakness / Q000175:diagnosis / Q000209:etiology / Q000503:physiopathology*; D009133:Muscular Atrophy / Q000209:etiology; D016059:Range of Motion, Articular; D012720:Severity of Illness Index; D019415:Torque