Robert C Lynall

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INTRODUCTION There are limited nonlaboratory soccer head impact biomechanics data. This is surprising given soccer's global popularity. Epidemiological data suggest that female college soccer players are at a greater concussion injury risk than their male counterparts. Therefore, the purposes of our study were to quantify head impact frequency and magnitude(More)
OBJECTIVE To determine if throwing arm shoulder range of motion (ROM) and scapular kinematic differences exist between baseball pitchers and position players over the course of a baseball season. DESIGN Prospective cohort. SETTING Professional baseball athletic training room. PARTICIPANTS Sixteen asymptomatic professional baseball pitchers and 16(More)
Our purpose was to determine the validity and test-retest reliability of the Protokinetics Movement Analysis Software (PKMAS) in measuring center of pressure (COP) during walking as compared to a force plate gold standard. Twenty-five healthy participants (14 females, 11 males; age 20.0±1.5years) completed 2 testing sessions approximately 5days apart(More)
PURPOSE This study aimed to determine the clinical utility of biomechanical head impact indicators by measuring the sensitivity, specificity, positive predictive value (PV+), and negative predictive value (PV-) of multiple thresholds. METHODS Head impact biomechanics (n = 283,348) from 185 football players in one Division I program were collected. A(More)
Our purpose was to determine concussion mechanism and activity differences among three cohorts of football players: youth, high school, and college. Participants in this prospective cohort study were youth (ages 5-14 years, 118 teams, 310 team-seasons), high school (96 teams, 184 team-seasons), and college (34 teams, 71 team-seasons) football players.(More)
OBJECTIVE To evaluate the clinical utility of "rebaseline" testing (ie, new baseline) before the season after an athlete's concussion recovery by (1) determining differences between baseline and rebaseline scores, and (2) comparing differences to clinical reliable change indices (RCIs). DESIGN Retrospective cohort. SETTING Clinical research center. (More)
STUDY DESIGN Retrospective cohort. BACKGROUND Participating in sports at high altitude may have a protective effect on the brain, according to research studies. Research using validated data-collection methods in a previously unexplored cohort may better estimate the association between concussion injury risk and altitude. OBJECTIVES To determine the(More)
Wearable sensors are becoming increasingly popular for measuring head motions and detecting head impacts. Many sensors are worn on the skin or in headgear and can suffer from motion artifacts introduced by the compliance of soft tissue or decoupling of headgear from the skull. The instrumented mouthguard is designed to couple directly to the upper(More)
CONTEXT   Dynamic balance during functional movement may provide important clinical information after concussion. The Sport Concussion Assessment Tool, version 3 (SCAT3), includes a timed tandem-gait test (heel-to-toe walking) administered with a pass-fail scoring system. Minimal evidence supports inclusion of the tandem-gait test in the SCAT3, especially(More)
CONTEXT Reported injury rates and services in sports injury surveillance may be influenced by the employment setting of the certified athletic trainers (ATs) reporting these data. OBJECTIVE To determine whether injury rates and the average number of AT services per injury in high school football varied by AT employment status. DESIGN Cross-sectional(More)