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Clinical Journal of Sport Medicine:
Original Research

The Influence of In-Season Injury Prevention Training on Lower-Extremity Kinematics during Landing in Female Soccer Players

Pollard, Christine D. PhD, PT; Sigward, Susan M. PhD, ATC, PT; Ota, Susumu PT; Langford, Karen DPT; Powers, Christopher M. PhD, PT

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Abstract

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° vs. 1.9°; P=0.01) and significantly greater hip abduction (−4.9° vs. −7.7°; 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.

© 2006 Lippincott Williams & Wilkins, Inc.

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