Changes in Drop-Jump Landing Biomechanics During Prolonged Intermittent Exercise
- UNCG Author/Contributor (non-UNCG co-authors, if there are any, appear on document)
- Robert A. Henson, Associate Professor (Creator)
- Randy J. Schmitz, Associate Professor (Creator)
- Sandra J. Shultz, Professor and Chair (Creator)
- Institution
- The University of North Carolina at Greensboro (UNCG )
- Web Site: http://library.uncg.edu/
Abstract: Background: As injury rates rise in the later stages of sporting activities, a better understanding of lower extremity biomechanics in the later phases of gamelike situations may improve training and injury prevention programs.Hypothesis: Lower extremity biomechanics of a drop-jump task (extracted from a principal components analysis) would reveal factors associated with risk of anterior cruciate ligament injury during a 90-minute individualized intermittent exercise protocol (IEP) and for 1 hour following the IEP.Study Design: Controlled laboratory study.Level of Evidence: Level 4.Methods: Fifty-nine athletes (29 women, 30 men) completed 3 sessions. The first session assessed fitness for an IEP designed to simulate the demands of a soccer match. An experimental session assessed drop-jump biomechanics, after a dynamic warm-up, every 15 minutes during the 90-minute IEP, and for 1 hour following the IEP. A control session with no exercise assessed drop-jump performance at the same intervals.Results: Two biomechanical factors early in the first half (hip flexion at initial contact and hip loading; ankle loading and knee shear force) decreased at the end of the IEP and into the 60-minute recovery period, while a third factor (knee loading) decreased only during the recovery period (P = 0.05).Conclusion: The individualized sport-specific IEP may have more subtle effects on landing biomechanics when compared with short-term, exhaustive fatigue protocols.Clinical Relevance: Potentially injurious landing biomechanics may not occur until the later stages of soccer activity.
Changes in Drop-Jump Landing Biomechanics During Prolonged Intermittent Exercise
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Created on 6/14/2016
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Additional Information
- Publication
- Sports Health. 2014;6(2)128-135.
- Language: English
- Date: 2014
- Keywords
- principal components, drop landing, soccer, anterior cruciate ligament