CONTEXT: Instruction can be used to alter the biomechanical movement patterns associated with anterior cruciate ligament (ACL) injuries. OBJECTIVE: To determine the effects of instruction through combination (self and expert) feedback or self-feedback on lower extremity kinematics during the box-drop-jump task, running-stop-jump task, and sidestep-cutting maneuver over time in college-aged female athletes. DESIGN: Randomized controlled clinical trial. SETTING: Laboratory. PATIENTS OR OTHER PARTICIPANTS: Forty-three physically active women (age = 21.47 ± 1.55 years, height = 1.65 ± 0.08 m, mass = 63.78 ± 12.00 kg) with no history of ACL or lower extremity injuries or surgery in the 2 months before the study were assigned randomly to 3 groups: self-feedback (SE), combination feedback (CB), or control (CT). INTERVENTION(S): Participants performed a box-drop-jump task for the pretest and then received feedback about their landing mechanics. After the intervention, they performed an immediate posttest of the box-drop-jump task and a running-stop-jump transfer test. Participants returned 1 month later for a retention test of each task and a sidestep-cutting maneuver. Kinematic data were collected with an 8-camera system sampled at 500 Hz. MAIN OUTCOME MEASURE(S): The independent variables were feedback group (3), test time (3), and task (3). The dependent variables were knee- and hip-flexion, knee-valgus, and hip- abduction kinematics at initial contact and at peak knee flexion. RESULTS: For the box-drop-jump task, knee- and hip-flexion angles at initial contact were greater at the posttest than at the retention test (P < .001). At peak knee flexion, hip flexion was greater at the posttest than at the pretest (P = .003) and was greater at the retention test than at the pretest (P = .04); knee valgus was greater at the retention test than at the pretest (P = .03) and posttest (P = .02). Peak knee flexion was greater for the CB than the SE group (P = .03) during the box-drop-jump task at posttest. For the running-stop-jump task at the posttest, the CB group had greater peak knee flexion than the SE and CT (P ≤ .05). CONCLUSIONS: Our results suggest that feedback involving a combination of self-feedback and expert video feedback with oral instruction effectively improved lower extremity kinematics during jump-landing tasks.
RCT Entities:
CONTEXT: Instruction can be used to alter the biomechanical movement patterns associated with anterior cruciate ligament (ACL) injuries. OBJECTIVE: To determine the effects of instruction through combination (self and expert) feedback or self-feedback on lower extremity kinematics during the box-drop-jump task, running-stop-jump task, and sidestep-cutting maneuver over time in college-aged female athletes. DESIGN: Randomized controlled clinical trial. SETTING: Laboratory. PATIENTS OR OTHER PARTICIPANTS: Forty-three physically active women (age = 21.47 ± 1.55 years, height = 1.65 ± 0.08 m, mass = 63.78 ± 12.00 kg) with no history of ACL or lower extremity injuries or surgery in the 2 months before the study were assigned randomly to 3 groups: self-feedback (SE), combination feedback (CB), or control (CT). INTERVENTION(S): Participants performed a box-drop-jump task for the pretest and then received feedback about their landing mechanics. After the intervention, they performed an immediate posttest of the box-drop-jump task and a running-stop-jump transfer test. Participants returned 1 month later for a retention test of each task and a sidestep-cutting maneuver. Kinematic data were collected with an 8-camera system sampled at 500 Hz. MAIN OUTCOME MEASURE(S): The independent variables were feedback group (3), test time (3), and task (3). The dependent variables were knee- and hip-flexion, knee-valgus, and hip- abduction kinematics at initial contact and at peak knee flexion. RESULTS: For the box-drop-jump task, knee- and hip-flexion angles at initial contact were greater at the posttest than at the retention test (P < .001). At peak knee flexion, hip flexion was greater at the posttest than at the pretest (P = .003) and was greater at the retention test than at the pretest (P = .04); knee valgus was greater at the retention test than at the pretest (P = .03) and posttest (P = .02). Peak knee flexion was greater for the CB than the SE group (P = .03) during the box-drop-jump task at posttest. For the running-stop-jump task at the posttest, the CB group had greater peak knee flexion than the SE and CT (P ≤ .05). CONCLUSIONS: Our results suggest that feedback involving a combination of self-feedback and expert video feedback with oral instruction effectively improved lower extremity kinematics during jump-landing tasks.
Authors: James A Oñate; Kevin M Guskiewicz; Stephen W Marshall; Carol Giuliani; Bing Yu; William E Garrett Journal: Am J Sports Med Date: 2005-04-12 Impact factor: 6.202
Authors: Scott C Landry; Kelly A McKean; Cheryl L Hubley-Kozey; William D Stanish; Kevin J Deluzio Journal: Am J Sports Med Date: 2007-10-05 Impact factor: 6.202
Authors: Hanni R Cowley; Kevin R Ford; Gregory D Myer; Thomas W Kernozek; Timothy E Hewett Journal: J Athl Train Date: 2006 Jan-Mar Impact factor: 2.860
Authors: Bobbie S Irmischer; Chad Harris; Ronald P Pfeiffer; Mark A DeBeliso; Kent J Adams; Kevin G Shea Journal: J Strength Cond Res Date: 2004-11 Impact factor: 3.775
Authors: Jed A Diekfuss; Dustin R Grooms; Scott Bonnette; Christopher A DiCesare; Staci Thomas; Ryan P MacPherson; Jonathan D Ellis; Adam W Kiefer; Michael A Riley; Daniel K Schneider; Brooke Gadd; Katie Kitchen; Kim D Barber Foss; Jonathan A Dudley; Weihong Yuan; Gregory D Myer Journal: Psychophysiology Date: 2020-02-13 Impact factor: 4.016
Authors: Dustin R Grooms; Ajit Chaudhari; Stephen J Page; Deborah S Nichols-Larsen; James A Onate Journal: J Athl Train Date: 2018-05-11 Impact factor: 2.860