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Instruction of jump-landing technique using videotape feedback: altering lower extremity motion patterns
James A Oñate1, Kevin M Guskiewicz, Stephen W Marshall
1University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA. jonate@odu.edu
The American Journal of Sports Medicine
|April 14, 2005
Summary
Videotape feedback using self-modeling or a combination of expert and self-models effectively improves knee flexion and reduces landing forces, aiding anterior cruciate ligament injury prevention.
Area of Science:
- Biomechanics
- Sports Medicine
- Injury Prevention
Background:
- Anterior cruciate ligament (ACL) injuries are common in athletes.
- Jump-landing technique is a key focus for ACL injury prevention programs.
- Videotape feedback is utilized to improve landing mechanics.
Purpose of the Study:
- To evaluate the effectiveness of different videotape feedback models on jump-landing biomechanics.
- To determine if videotape feedback can increase knee flexion and decrease landing forces.
- To compare the efficacy of expert-only, self-only, and combined expert-self feedback models.
Main Methods:
- Controlled laboratory study involving college-aged recreational athletes.
- Participants were assigned to expert-only, self-only, combined feedback, or nonfeedback groups.
- Knee kinematics and kinetics were measured during a basketball jump-landing task across three testing occasions.
Main Results:
- All feedback groups demonstrated significant increases in knee angular displacement and reductions in peak vertical ground reaction forces.
- Self-modeling and combined feedback groups showed greater improvements in knee flexion compared to the control group.
- No significant changes were observed in initial contact knee flexion or peak anterior tibial shear forces.
Conclusions:
- Videotape feedback, particularly using self-modeling or combined models, is effective for enhancing knee flexion during landing.
- This feedback approach can help reduce peak vertical forces, contributing to anterior cruciate ligament injury prevention.
- Self or combined modeling is more effective than expert-only modeling for instructional programs aimed at reducing jump-landing related ACL injuries.