title: Functional recovery after anterior cruciate ligament reconstruction: a longitudinal perspective.
abstract: OBJECTIVE
  To evaluate functional hop performance in subjects with an anterior cruciate ligament (ACL) reconstruction with a bone-patellar tendon-bone graft during 12, 18, 26, 39, and 52 weeks.
  
  
  METHODS
  A longitudinal comparative study.
  
  
  METHODS
  University research laboratory.
  
  
  METHODS
  Patients (N=19) were evaluated at 12, 18, 26, 39, and 52 weeks after ACL reconstruction surgery.
  
  
  METHODS
  Testing on 5 separate occasions.
  
  
  METHODS
  The Cincinnati Knee Rating System and analog scales, the 6-meter timed hop, crossover hop, stair hop, and vertical hop, and limb symmetry indices.
  
  
  RESULTS
  The uninjured and injured legs and test order were randomized. There was a significant test occasion main effect for both the Cincinnati and analog scores (P=.001). Subjective rating scores improved over the 5 testing occasions. For all 4 hop tests, test occasion and limb main effects were significant (P=.001). Paired t test comparisons at each testing occasion indicated a significant difference between the reconstructed and uninjured limb (P<.05). Furthermore, significant test occasion main effects were noted for limb symmetry indices for the 4 hop tests (P=.001). Using a score of greater than or equal to 85% as a criterion for normative limb symmetry, normative scores were recorded in the 6-m timed hop at the week 18 test occasion, the stair hop and vertical hop at the week 26 test occasion, and the crossover hop at the week 39 test occasion.
  
  
  CONCLUSIONS
  These hop tests showed different levels of imposed demands on the knee that could be used to assess functional recovery and readiness to resume sport.
authors.affiliation: School of Physiotherapy, Curtin University of Technology, Bentley, Western Australia, Australia. D.Hopper@curtin.edu.au
authors.forename: Diana M
authors.initials: DM
authors.lastname: Hopper
authors.forename: Geoff R
authors.initials: GR
authors.lastname: Strauss
authors.forename: Jeff J
authors.initials: JJ
authors.lastname: Boyle
authors.forename: Jonathan
authors.initials: J
authors.lastname: Bell
mesh_terms: D000328:Adult; D000704:Analysis of Variance; D016118:Anterior Cruciate Ligament / Q000601:surgery*; D000070598:Anterior Cruciate Ligament Injuries; D050376:Bone-Patellar Tendon-Bone Grafting / Q000534:rehabilitation*; D005260:Female; D006801:Humans; D007718:Knee Injuries / Q000534:rehabilitation*; D008137:Longitudinal Studies; D008297:Male; D019651:Plastic Surgery Procedures / Q000534:rehabilitation; D020127:Recovery of Function; D016896:Treatment Outcome