Sports Sciences Commons^™

Sex And Age Comparisons In Neuromuscular And Biomechanical Characteristics Of The Knee In Young Athletes, Erin R. Pletcher, Travis J. Dekker, Scott M. Lephart, Tim C. Sell

Sports Medicine Research Institute Faculty Publications

Background: The identification of risk factors for injury is a key step for musculoskeletal injury prevention in youth sports. Not identifying and correcting for injury risk factors may result in lost opportunity for athletic development. Physical maturation and sex affect these characteristics, which may indicate the need for both age and sex-based injury prevention programs.

Hypothesis/Purpose: This study examined age and sex differences in knee strength, static balance, jump height, and lower extremity landing biomechanics in school- and high school-age athletes.

Study Design: Cross-sectional.

Methods: Forty healthy school aged (10.8±0.8 yrs) and forty high school (16.8±0.8 yrs) athletes completed isokinetic …

Line Hops And Side Hold Rotation Tests Load Both Anterior And Posterior Shoulder: A Biomechanical Study, Margie K. Olds, Nicole Lemaster, Kelsey Picha, Cody Walker, Nicholas R. Heebner, Timothy L. Uhl

Sports Medicine Research Institute Faculty Publications

Background: Clinical tests should replicate the stressful positions encountered during sport participation. Evaluating the kinetic and electromyographical demands of clinical tests enables clinicians to choose appropriate tests for specific sports.

Purpose: To describe the shoulder forces and muscle activation levels during closed chain functional tests of Line Hops (LH) and Side Hold Rotation (SHR).

Study Design: Descriptive biomechanical study.

Methods: Ten asymptomatic participants were examined in a university laboratory. Two functional tests were evaluated using three-dimensional video analysis and electromyography to measure shoulder forces, moments, and muscular activity levels.

Results: SHR produced a peak average posterior translation force of 4.84 …

Sport-Specific Differences In Dynamic Visual Acuity And Gaze Stabilization In Division-I Collegiate Athletes, Carolina Quintana, Nicholas R. Heebner, Anne D. Olson, J. P. Abt, Matthew C. Hoch

Sports Medicine Research Institute Faculty Publications

BACKGROUND: The vestibular-ocular reflex (VOR) integrates the vestibular and ocular systems to maintain gaze during head motion. This reflex is often negatively affected following sport-related concussion. Objective measures of gaze stability, a function mediated by the VOR, such as the computerized dynamic visual acuity test (DVAT) and gaze stabilization test (GST), may have utility in concussion management. However, normative data specific to sport, sex, or concussion history have not been established in collegiate athletes.

OBJECTIVE: The objective of this study was to establish normative values for the DVAT and GST in collegiate athletes and explore the effect of sport, sex, …