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Age related differences in functional hamstring/quadriceps ratio following soccer exercise in female youth players: An injury risk factor

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Author
De Ste Croix, Mark
Priestley, Abigail
Lloyd, Rhodri S.
Oliver, Jon
Date
2017-08-01
Acceptance date
2017-07-31
Type
Article
Publisher
Human Kinetics
ISSN
1543-2920 (ESSN)
Metadata
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Abstract
Purpose = Fatigue negatively alters dynamic knee control and the functional hamstring/quadriceps ratio (H/QFUNC) plays an important role in stabilising the joint. The aim of this study was to investigate the influence of soccer specific exercise on H/QFUNC in U13, U15 and U17 year-old female soccer players. Methods: 36 female players performed concentric and eccentric actions of the hamstrings at 60, 120 and 180°/s before and after an age group specific field based soccer protocol. H/QFUNC was determined in the first 30° of knee flexion. Results = Significant angle x velocity (p = 0.001) and time x angle (p = 0.033) interaction effects were found indicating a lower H/QFUNC with increased movement velocity at 0-10° as opposed to greater knee flexion angles. Fatigue related effects were only evident near full knee extension. Probabilistic inferences indicated that changes in H/QFUNC were generally unclear in U13s, likely detrimental in U15s and very likely beneficial in U17s. Conclusions = Altered muscular control following soccer specific exercise is age dependent with players 1-year post peak height velocity at greatest risk of injury. Injury prevention and screening need to be age and maturation appropriate, should take into account the effects of fatigue, and include movements near full extension.
Journal/conference proceeding
Pediatric Exercise Science;
Citation
De Ste Croix, M.B.A., Priestly, A.M., Lloyd, R.S. and Oliver, J.L. (2017) 'Age related differences in functional hamstring/quadriceps ratio following soccer exercise in female youth players: An injury risk factor' Pediatric Exercise Science, 30 (3), pp. 376-382 . https://doi.org/10.1123/pes.2017-0034
URI
http://hdl.handle.net/10369/9045
DOI
https://doi.org/10.1123/pes.2017-0034
Description
This article published in Pediatric Exercise Science ahead of print available at https://doi.org/10.1123/pes.2017-0034
Rights
https://creativecommons.org/licenses/by/4.0/
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