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Movement quality assessments during the one leg countermovement jump test in youth soccer players
ESSKA Academy. Scinicarelli G. Nov 8, 2019; 284436; epESMA-29 Topic: Knee
Mr. Giordano Scinicarelli
Mr. Giordano Scinicarelli
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Movement quality assessments during the one leg countermovement jump test in youth soccer players

ePoster - epESMA-29

Topic: Prevention in Sports

Wilke C.1, Offerhaus C.2, Scinicarelli G.1, Bynoe M.D.1, Froböse I.1, Feodoroff B.1
1German Sport University, Institute of Movement Therapy and Movement-oriented Prevention and Rehabilitation, Köln, Germany, 2Witten/Herdecke University, Sana Medical Centre, Department of Orthopedic Surgery and Sports Traumatology, Köln, Germany

Introduction: Injuries can be a setback on an individual level and for the entire team performance. Most injuries in soccer affect the lower extremities. Many of which may result in a long term rehabilitation process and potentially the end of a professional career, with less favorable outcomes in international and national competitions. Therefore, further development of preventative screening methods are necessary and must be addressed starting at an early age of sport participation.
Objectives: The objective of this study was to analyze movement quality and identify deficient movement patterns for injury prevention. Practical implications on how to evaluate the qualitative movement control are given.
Aims: The aim of this study was to discover age-specific impaired movement patterns representing possible indicators for a severe knee injury.
Methods: 180 male soccer players from 12 teams (U7-U19) of the youth development academy of a professional soccer club were recruited. All athletes performed the single leg counter movement jump and were recorded from the frontal plane. The videos from the best right and left leg performance of all subjects were subjectively analyzed by one rater, with two different scales: the “POEs” scale (Postural Orientation Errors) during the countermovement phase and the “LESS” scale (Landing Error Scoring System) during the landing phase.
Results: In all age groups, the movement quality during the countermovement phase resulted in fewer impaired movement control, with the lateral displacement of the trunk (13%), followed by pelvis (12%) and knee (7%) representing the most observed compensatory movements. During the landing phase, highest incidence of impaired movement control was observed, with the lateral trunk flexion (71%) and the pelvic drop (69%) representing the most observed compensatory movements, followed by knee valgus at initial contact (30%) and tibia rotation (25%). Interestingly, the knee valgus incidence rates show a percentage decrease from 41% (U7-U10) to 30% (U15-U19).
Conclusions: The countermovement jump is an appropriate functional test to identify injury risk factors using an individual observational analysis of the movement control. Youth soccer players may have an increased risk of lower extremity injuries due to trunk, pelvis and knee valgus compensatory movements observed. Younger athletes land with higher knee valgus rates, which is an important injury predictor for a severe knee injury.
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