Dissertation/Thesis Abstract

Effects of an Overhead Target on Lower Extremity Mechanics During a Vertical Drop Jump
by Kashdan, Aryeh, M.S., California State University, Long Beach, 2019, 72; 27545817
Abstract (Summary)

This study evaluated the effects of the addition of a Vertec as an external target to a Vertical Drop Jump task on hip flexion, hip internal rotation, knee flexion, knee abduction, knee internal rotation, ankle dorsiflexion, peak knee extension moment, peak knee frontal plane moment, and peak vertical ground reaction force during the task’s initial loading phase. All kinematic values were collected both at initial ground contact and at their peak values during the loading phase. The sample used for this data collection consisted of female collegiate volleyball athletes.

The study’s results suggest that when performing the vertical drop jump with the overhead target, the participants experienced changes in lower extremity kinematics. Additionally, significant side-to-side asymmetries were observed both for kinematic variables and peak vertical ground reaction forces. Further longitudinal study is required to determine if the addition of the Vertec as an external target to a vertical drop jump task would make the test a more valid predictor of ACL injury in this population. Additionally, future research could elucidate if the unilateral reach used in this study was a contributor to the observed bilateral asymmetries.

Indexing (document details)
Advisor: Crussemeyer, Jill
Commitee: Valenzuela, Kevin, Lund, Bryan
School: California State University, Long Beach
Department: Kinesiology
School Location: United States -- California
Source: MAI 81/8(E), Masters Abstracts International
Subjects: Kinesiology, Biomechanics
Keywords: Vertec
Publication Number: 27545817
ISBN: 9781658420655
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