Dynamic Knee Valgus and its Relationship with Performance in the Countermovement Jump and the Squat Jump

Lagares L, Silva M, Macedo R, Lino R, Santos F, Ide B, Almeida L, Bomfim E, Santos C. Dynamic Knee Valgus and its Relationship with Performance in the Countermovement Jump and the Squat Jump. JEPonline 2018;24(6):1-10. The purpose of this study was to test the hypothesis that Dynamic Knee Valgus (DKV) decreased performance in the Countermovement Jump (CMJ) and the Squat Jump (SJ) in judo athletes. Anthropometric measurements of body mass and height were collected, the DKV was analyzed during the Step-Down Test, and the power of the lower limbs was assessed using a contact platform during the CMJ and the SJ. The sample consisted of 39 male judo athletes of which 61.5% had DKV. In the analysis of the maximum height reached between the CMJ and the SJ in the group without DKV, significant differences (P