Status of The Bilateral Deficit (BLD) in Youth Soccer Players who are being directed towards high performance

Jose Acero
Research & Biomechanical Solutions Institute

Hernando Arias
Asociaci?n Deportivo Cali.Youth Division

Jaime Albarrac
ASociaci?n Deportivo Cali. Medical Director

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     Last modified: January 17, 2007

Abstract
This research determined the status of the Bilateral Deficit (BLD) in terms of variability among individuals, categories and play positions in youth soccer players who are being directed towards high performance. 221 soccer players distributed into 11 categories from youth division of the Asociaci?n Deportivo Cali in Colombia, participated in this investigation executing 9 Abalakov jumps (Acero- Ibarg?en, 2002 Protocol) on a contact platform (New Test) using three modalities: right leg, left leg and bilateral. 38.91% of players had a good % BLD, 8,14% were acceptable, 24.89% were regular and 28.05% were deficient. The pre-infant and gorrion categories acquired the best BLD results. The center back (% BLD x = -19.96) and forwards players (% BLD x = -19.68) were the best performers with good level of acceptability. As a process, the Acero- Ibarg?en, 2002 Protocol, is easy to applied, quick and objective to evaluate the % BLD and allow to project the fact that this neuromuscular phenomenon will become as an indicator of the condition of recruitment of fast motor units. A new body kinetic concept to this type of youth players will emerge.

KEY WORDS: motor control, biomechanics, bilateral deficit, maximal power