Journal article
Knee Valgus during Drop Jumps in National Collegiate Athletic Association Division I Female Athletes: The Effect of a Medial Post
The American journal of sports medicine, v 36(2)
Feb 2008
PMID: 17977999
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Background Female athletes land from a jump with greater knee valgus and ankle pronation/eversion. Excessive valgus and pronation have been linked to risk of anterior cruciate ligament injury. A medially posted orthosis decreases component motions of knee valgus such as foot pronation/eversion and tibial internal rotation. Hypothesis We hypothesized a medial post would decrease knee valgus and ankle pronation/eversion during drop-jump landings in NCAA-I female athletes. Study Design Controlled laboratory study. Methods Knee and ankle 3-dimensional kinematics were measured using high-speed motion capture in 10 National Collegiate Athletic Association Division I female athletes during a drop-jump landing with and without a medial post. Analysis of variance was used to determine differences in posting condition, t tests were used to determine dominant-nondominant differences, and the Pearson correlation coefficient was used to determine relationships between variables. Results Significant differences were found for all measures in the posted condition. A medial post decreased knee valgus at initial contact (1.24°, P< .01) and maximum angle (1.21 °, P< .01). The post also decreased ankle pronation/eversion at initial contact (0.77°, P < .01) and maximum angle (0.95°, P = .039). Conclusion The authors have demonstrated a significant decrease in knee valgus and ankle pronation/eversion during a drop jump with a medial post placed in the athletes’ shoes. Clinical Relevance A medial post may be a potential means to decrease risk of anterior cruciate ligament injury.
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Details
- Title
- Knee Valgus during Drop Jumps in National Collegiate Athletic Association Division I Female Athletes
- Creators
- Michael Joseph - Department of Kinesiology, University of Connecticut, Storrs, ConnecticutDavid Tiberio - Department of Physical Therapy, University of Connecticut, Storrs, ConnecticutJennifer L Baird - Department of Kinesiology, University of Massachusetts, Amherst, MassachusettsThomas H Trojian - Department of Sports Medicine, University of Connecticut, Storrs, ConnecticutJeffrey M Anderson - Department of Kinesiology, University of Connecticut, Storrs, Connecticut, Department of Sports Medicine, University of Connecticut, Storrs, ConnecticutWilliam J Kraemer - Department of Kinesiology, University of Connecticut, Storrs, ConnecticutCarl M Maresh - Department of Kinesiology, University of Connecticut, Storrs, Connecticut
- Publication Details
- The American journal of sports medicine, v 36(2)
- Publisher
- Sage
- Resource Type
- Journal article
- Language
- English
- Web of Science ID
- WOS:000252663900008
- Scopus ID
- 2-s2.0-38349102257
- Other Identifier
- 991014877996404721
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- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Orthopedics
- Sport Sciences