title: Effects of task-specific augmented feedback on deficit modification during performance of the tuck-jump exercise.
abstract: BACKGROUND
  Anterior cruciate ligament (ACL) injuries are prevalent in female athletes. Specific factors have possible links to increasing a female athlete's chances of suffering an ACL injury. However, it is unclear if augmented feedback may be able to decrease possible risk factors.
  
  
  OBJECTIVE
  To compare the effects of task-specific feedback on a repeated tuck-jump maneuver.
  
  
  METHODS
  Double-blind randomized controlled trial.
  
  
  METHODS
  Sports-medicine biodynamics center.
  
  
  METHODS
  37 female subjects (14.7 ± 1.5 y, 160.9 ± 6.8 cm, 54.5 ± 7.2 kg).
  
  
  METHODS
  All athletes received standard off-season training consisting of strength training, plyometrics, and conditioning. They were also videotaped during each session while running on a treadmill at a standardized speed (8 miles/h) and while performing a repeated tuck-jump maneuver for 10 s. The augmented feedback group (AF) received feedback on deficiencies present in a 10-s tuck jump, while the control group (CTRL) received feedback on 10-s treadmill running.
  
  
  METHODS
  Outcome measurements of tuck-jump deficits were scored by a blinded rater to determine the effects of group (CTRL vs AF) and time (pre- vs posttesting) on changes in measured deficits.
  
  
  RESULTS
  A significant interaction of time by group was noted with the task-specific feedback training (P = .03). The AF group reduced deficits measured during the tuck-jump assessment by 23.6%, while the CTRL training reduced deficits by 10.6%.
  
  
  CONCLUSIONS
  The results of the current study indicate that task-specific feedback is effective for reducing biomechanical risk factors associated with ACL injury. The data also indicate that specific components of the tuck-jump assessment are potentially more modifiable than others.
authors.affiliation: Div of Sports Medicine, Cincinnati Children's Hospital, Cincinnati, OH, USA.
authors.forename: Benjamin W
authors.initials: BW
authors.lastname: Stroube
authors.forename: Gregory D
authors.initials: GD
authors.lastname: Myer
authors.forename: Jensen L
authors.initials: JL
authors.lastname: Brent
authors.forename: Kevin R
authors.initials: KR
authors.lastname: Ford
authors.forename: Robert S
authors.initials: RS
authors.lastname: Heidt
authors.forename: Timothy E
authors.initials: TE
authors.lastname: Hewett
mesh_terms: D000293:Adolescent; D000070598:Anterior Cruciate Ligament Injuries; D001696:Biomechanical Phenomena / Q000502:physiology; D004311:Double-Blind Method; D005080:Exercise Test / Q000379:methods; D005260:Female; D006801:Humans; D009068:Movement / Q000502:physiology*; D011597:Psychomotor Performance / Q000502:physiology*; D018570:Risk Assessment; D014481:United States; D014741:Video Recording