The Effects of Neuromuscular Training on Knee Joint Motor Control During Sidecutting in Female Elite Soccer and Handball Players.
Zebis, Mette K cand.scient, PhD *+; Bencke, Jesper PhD ++; Andersen, Lars L cand.scient *+; Dossing, Simon MD *; Alkjaer, Tine PhD [S]; Magnusson, S Peter DMedSci *; Kjaer, Michael MD, DMedSci *; Aagaard, Per PhD [P]
Clinical Journal of Sport Medicine.
18(4):329-337, July 2008.
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Objective: The project aimed to implement neuromuscular training during a full soccer and handball league season and to experimentally analyze the neuromuscular adaptation mechanisms elicited by this training during a standardized sidecutting maneuver known to be associated with non-contact anterior cruciate ligament (ACL) injury.
Design: The players were tested before and after 1 season without implementation of the prophylactic training and subsequently before and after a full season with the implementation of prophylactic training.
Participants: A total of 12 female elite soccer players and 8 female elite team handball players aged 26 /- 3 years at the start of the study.
Intervention: The subjects participated in a specific neuromuscular training program previously shown to reduce non-contact ACL injury.
Methods: Neuromuscular activity at the knee joint, joint angles at the hip and knee, and ground reaction forces were recorded during a sidecutting maneuver. Neuromuscular activity in the prelanding phase was obtained 10 and 50 ms before foot strike on a force plate and at 10 and 50 ms after foot strike on a force plate.
Results: Neuromuscular training markedly increased before activity and landing activity electromyography (EMG) of the semitendinosus (P < 0.05), while quadriceps EMG activity remained unchanged.
Conclusions: Neuromuscular training increased EMG activity for the medial hamstring muscles, thereby decreasing the risk of dynamic valgus. This observed neuromuscular adaptation during sidecutting could potentially reduce the risk for non-contact ACL injury.
(C) 2008 Lippincott Williams & Wilkins, Inc.