The influence of inseason injury prevention training on lower-extremity kinematics during landing in female soccer players

Author(s): Pollard CD, Sigward SM, Ota S, Langford K, Powers CM


Objective:To examine the influence of in-season injury prevention training on hip and knee kinematics during a landing task.

Design:Longitudinal pre-post intervention study.

Setting:Testing sessions were conducted in a biomechanics research laboratory.

Participants:Eighteen female soccer players between the ages of 14 and 17 participated in this study. All subjects were healthy with no current complaints of lower extremity injury.

Interventions:Testing sessions were conducted prior to and following a season of soccer practice combined with injury prevention training.

Main outcome measurements:During each testing session three-dimensional kinematics were collected while each subject performed a drop landing task. Peak hip and knee joint angles were measured during the early deceleration phase of landing and compared between pre- and post-training using paired t-tests.

Results:Following a season of soccer practice combined with injury prevention training, females demonstrated significantly less hip internal rotation (7.1 degrees vs. 1.9 degrees; P = 0.01) and significantly greater hip abduction (-4.9 degrees vs. -7.7 degrees; P = 0.02). No differences in knee valgus or knee flexion angles were found post-season.

Conclusions:Female soccer players exhibited significant changes in hip kinematics during a landing task following in-season injury prevention training. Our results support the premise that a season of soccer practice combined with injury prevention training is effective in altering lower extremity motions that may play a role in predisposing females to ACL injury.

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