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Changes in Drop-Jump Landing Biomechanics During Prolonged Intermittent Exercise

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...

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Autores principales: Schmitz, Randy J., Cone, John C., Tritsch, Amanda J., Pye, Michele L., Montgomery, Melissa M., Henson, Robert A., Shultz, Sandra J.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: SAGE Publications 2014
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3931337/
https://www.ncbi.nlm.nih.gov/pubmed/24587862
http://dx.doi.org/10.1177/1941738113503286
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author Schmitz, Randy J.
Cone, John C.
Tritsch, Amanda J.
Pye, Michele L.
Montgomery, Melissa M.
Henson, Robert A.
Shultz, Sandra J.
author_facet Schmitz, Randy J.
Cone, John C.
Tritsch, Amanda J.
Pye, Michele L.
Montgomery, Melissa M.
Henson, Robert A.
Shultz, Sandra J.
author_sort Schmitz, Randy J.
collection PubMed
description 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.
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spelling pubmed-39313372015-03-01 Changes in Drop-Jump Landing Biomechanics During Prolonged Intermittent Exercise Schmitz, Randy J. Cone, John C. Tritsch, Amanda J. Pye, Michele L. Montgomery, Melissa M. Henson, Robert A. Shultz, Sandra J. Sports Health Athletic Training 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. SAGE Publications 2014-03 /pmc/articles/PMC3931337/ /pubmed/24587862 http://dx.doi.org/10.1177/1941738113503286 Text en © 2013 The Author(s)
spellingShingle Athletic Training
Schmitz, Randy J.
Cone, John C.
Tritsch, Amanda J.
Pye, Michele L.
Montgomery, Melissa M.
Henson, Robert A.
Shultz, Sandra J.
Changes in Drop-Jump Landing Biomechanics During Prolonged Intermittent Exercise
title Changes in Drop-Jump Landing Biomechanics During Prolonged Intermittent Exercise
title_full Changes in Drop-Jump Landing Biomechanics During Prolonged Intermittent Exercise
title_fullStr Changes in Drop-Jump Landing Biomechanics During Prolonged Intermittent Exercise
title_full_unstemmed Changes in Drop-Jump Landing Biomechanics During Prolonged Intermittent Exercise
title_short Changes in Drop-Jump Landing Biomechanics During Prolonged Intermittent Exercise
title_sort changes in drop-jump landing biomechanics during prolonged intermittent exercise
topic Athletic Training
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3931337/
https://www.ncbi.nlm.nih.gov/pubmed/24587862
http://dx.doi.org/10.1177/1941738113503286
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