title: The effect of a 3-month prevention program on the jump-landing technique in basketball: a randomized controlled trial.
abstract: BACKGROUND
  In jump-landing sports, the injury mechanism that most frequently results in an injury is the jump-landing movement. Influencing the movement patterns and biomechanical predisposing factors are supposed to decrease injury occurrence.
  
  
  OBJECTIVE
  To evaluate the influence of a 3-mo coach-supervised jump-landing prevention program on jump-landing technique using the jump-landing scoring (JLS) system.
  
  
  METHODS
  Randomized controlled trial.
  
  
  METHODS
  On-field.
  
  
  METHODS
  116 athletes age 15-41 y, with 63 athletes in the control group and 53 athletes in the intervention group.
  
  
  METHODS
  The intervention program in this randomized control trial was administered at the start of the basketball season 2010-11. The jump-landing training program, supervised by the athletic trainers, was performed for a period of 3 mo.
  
  
  METHODS
  The jump-landing technique was determined by registering the jump-landing technique of all athletes with the JLS system, pre- and postintervention.
  
  
  RESULTS
  After the prevention program, the athletes of the male and female intervention groups landed with a significantly less erect position than those in the control groups (P < .05). This was presented by a significant improvement in maximal hip flexion, maximal knee flexion, hip active range of motion, and knee active range of motion. Another important finding was that postintervention, knee valgus during landing diminished significantly (P < .05) in the female intervention group compared with their control group. Furthermore, the male intervention group significantly improved (P < .05) the scores of the JLS system from pre- to postintervention.
  
  
  CONCLUSIONS
  Malalignments such as valgus position and insufficient knee flexion and hip flexion, previously identified as possible risk factors for lower-extremity injuries, improved significantly after the completion of the prevention program. The JLS system can help in identifying these malalignments.
  
  
  METHODS
  Therapy, prevention, level 1b.
authors.affiliation: Dept of Human Physiology and Sports Medicine, Vrije Universiteit Brussel, Brussels, Belgium.
authors.forename: Inne
authors.initials: I
authors.lastname: Aerts
authors.forename: Elke
authors.initials: E
authors.lastname: Cumps
authors.forename: Evert
authors.initials: E
authors.lastname: Verhagen
authors.forename: Bram
authors.initials: B
authors.lastname: Wuyts
authors.forename: Sam
authors.initials: S
authors.lastname: Van De Gucht
authors.forename: Romain
authors.initials: R
authors.lastname: Meeusen
mesh_terms: D000293:Adolescent; D000328:Adult; D001265:Athletic Injuries / Q000517:prevention & control*; D001490:Basketball / Q000293:injuries*; D001530:Belgium; D001696:Biomechanical Phenomena; D005260:Female; D006801:Humans; D007866:Leg / Q000502:physiology*; D007869:Leg Injuries / Q000503:physiopathology* / Q000517:prevention & control*; D008297:Male; D009068:Movement / Q000502:physiology*; D010806:Physical Education and Training