Validez relacionada con el criterio de las medidas bidimensionales de la cinemática de la cadera, la rodilla y el tobillo durante los aterrizajes bilaterales con salto y caída

Three-dimensional (3D) motion capture systems have been used to identify athletes in high risk of injury, but due their cost, lack portability and qualified technicians, an alternative is needed, such as two-dimensional (2D) systems. The purpose this study was examine the criterion-related validity three measures frontal plane knee alignment (Frontal projection angle [FPPA], knee-to-ankle separation ratio [KASR] medial displacement [KMD]) two sagittal (hip flexion ranges [ROMs]), recorded simultaneously using a 2D video analysis procedure 3D system. Twenty-nine male futsal players had kinematics assessed while performing bilateral drop vertical jumps (DVJ). kinematic obtained system determined through estimation equation, typical error estimate (TEEST) correlation (r). Kappa correlations were also calculated determine agreement between approaches. results showed poor for FPPA measure (standardized TEEST = 1.34 [large], r 0.60) moderate KASR 0.88 [moderate], 0.77), KMD 0.53 [small], 0.88), hip ROM 0.62 0.85) 0.56 0.87) measures. However, only levels (kappa > 0.7). Therefore, during DVJ might be considered valid feasible alternatives respective criterion quantify detect who demonstrated aberrant movement patterns planes, respectively.