Abstract

Biomechanical studies have shown that greater dynamic knee valgus is associated with the development of knee injuries, especially in women. The identification of risk factors for knee injuries favors specific prevention strategies. PURPOSE: To investigate the relationship between the subjective evaluation of dynamic knee valgus through SDT and DVJT, and the development of knee sprain in young female athletes. METHODS: Eigthy-three young female athletes who played basketball, soccer, and handball were followed for three consecutive seasons (2010-2012). Initially, we assessed dynamic knee valgus through SDT and DVJT. According to these performance tests, each subject was classified to have good, reduced, or poor control of dynamic knee valgus. To verify the relationship between the variables with the development of knee sprain, the athletes were divided into two groups: Knee Sprain Group (KSG) and Non-Knee Sprain Group (NSG). RESULTS: In follow-up, seven sprained knees were diagnosed (7.1%). Groups showed significant differences in the dynamic valgus knee as assessed by DVJT (P = .029). The poor performance in DVJT increased the risk of knee sprain by 5.2 times (Relative Risk = 5.17, 95% CI = 1.28-21; P = .02). The dynamic valgus knee assessed by SDT showed no significant differences among the groups (P = .524). CONCLUSIONS: Young female athletes who have poor control of dynamic valgus knee as evaluated by DVJT have a high risk of knee sprain injury.

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