Knee Frontal Plane Projection Angle: A Comparison Study Between Drop Vertical Jump and Step-Down Tests With Young Volleyball Athletes

• DOI: 10.1123/jsr.2017-0204
• Publication Date: 2017-11-01T20:33:39Z
• Authors: Gabriel Andrade Paz; Marianna de Freit...; Haroldo Gualter S...; Humberto Miranda; Vicente Lima; John D. Willson
• Keywords: Male; Adolescent; Knee Joint; Video Recording; Biomechanical Phenomena; Volleyball; 03 medical and health sciences; 0302 clinical medicine; Athletes; Exercise Test; Humans; Female; Range of Motion, Articular

Observational study.Altered frontal plane knee mechanics during dynamic tasks have been often associated with lower-extremity injuries. Strategies to decrease these risk factors and improve joint stability are applied in rehabilitation training environments.The purpose of this study was compare projection angles (FPPA) via 2-dimensional video analysis drop vertical jump (DVJ) step-down test (SDT) the preferred nonpreferred limbs young male female volleyball players.A total 60 (n = 29) 31) players (13.6 [1.1] y, 62.2 [11.2] kg, 170.8 [10] cm) participated study. Once athletes were screened for inclusion exclusion criteria, limb preference operationally defined as kicking leg or foot used stair climbing. In a randomized design, participants asked perform bilateral DVJ unilateral landing both limb. Kinematic performed recording FPPA alignment.No difference noted FFPA SDT between groups (P > .05). The significantly higher versus ≤ .05), but it not different athletes.Based on findings, clinicians may expect demonstrate similar symmetrical values across screening tests intended identify injury factors. However, greater should be expected more task.