title: Landing mechanics during single hop for distance in females following anterior cruciate ligament reconstruction compared to healthy controls.
abstract: OBJECTIVE
  To determine possible differences in single-hop kinematics and kinetics in females with anterior cruciate ligament reconstruction compared to healthy controls. A second purpose was to make comparisons between the healthy and reconstructed limbs.
  
  
  METHODS
  Subjects were grouped based on surgical status (33 ACLR patients and 31 healthy controls). 3D motion capture synchronized with force plates was used to capture the landing phase of three successful trials of single hop for distance during a single data collection session. Peak values during the loading phase were analysed. Subjects additionally completed three successful trials of the triple hop for distance Tegner activity scale and International Knee Document Committee 2000 (IKDC).
  
  
  RESULTS
  Controls demonstrated greater peak knee flexion and greater internal knee extension moment and hip extension moment than ACLR subjects. Within the ACLR group, the healthy limb exhibited greater peak knee flexion, hip flexion, hip extension moment, single hop and triple hops for distance and normalized quadriceps strength.
  
  
  CONCLUSIONS
  Patients who undergo anterior cruciate ligament reconstruction land in a more extended posture when compared to healthy controls and compared to their healthy limb.
  
  
  METHODS
  III.
authors.affiliation: Wisconsin Injury in Sport Laboratory, University of Wisconsin, 2000 Observatory Dr, Madison, WI, 53706, USA.
authors.forename: Stephanie M
authors.initials: SM
authors.lastname: Trigsted
authors.affiliation: Wisconsin Injury in Sport Laboratory, University of Wisconsin, 2000 Observatory Dr, Madison, WI, 53706, USA.
authors.forename: Eric G
authors.initials: EG
authors.lastname: Post
authors.affiliation: Wisconsin Injury in Sport Laboratory, University of Wisconsin, 2000 Observatory Dr, Madison, WI, 53706, USA. drbell2@wisc.edu.|Department of Orthopedics and Rehabilitation, University of Wisconsin, Madison, WI, USA. drbell2@wisc.edu.
authors.forename: David R
authors.initials: DR
authors.lastname: Bell
mesh_terms: D000293:Adolescent; D000328:Adult; D016118:Anterior Cruciate Ligament / Q000503:physiopathology* / Q000601:surgery; D000070598:Anterior Cruciate Ligament Injuries / Q000503:physiopathology* / Q000534:rehabilitation / Q000601:surgery; D059549:Anterior Cruciate Ligament Reconstruction / Q000534:rehabilitation*; D001696:Biomechanical Phenomena; D005080:Exercise Test; D005260:Female; D006801:Humans; D007719:Knee Joint / Q000503:physiopathology / Q000601:surgery; D052097:Quadriceps Muscle / Q000503:physiopathology* / Q000601:surgery; D016059:Range of Motion, Articular; D055815:Young Adult
keywords: Knee extension moment; Knee flexion; Quadriceps; Return to sport