184 747 May 29 3:45 PM - 3:55 PM Pelvic Motion Differences in Three Different Techniques of Jogging Stroller Propulsion Tyler W. Standifird, Williams Lauren, Steven McCuch, Johnny Crimm, Caitlyn Stainbrook, Kirk Wyckoff. Utah Valley University, Orem, UT. (Sponsor: Douglas Powell, FACSM) Email: tyler.standifird@uvu.edu (No relationships reported) Running with a jogging stroller has become a viable option for exercise in individuals serving as caregivers. Previous research has shown that stroller running leads to altered kinematics, but for many studies, running velocity was not constant between conditions. Some studies have reported altered trunk and pelvic motion during two-handed stroller running. PURPOSE:This study compared pelvic motion in all three planes of motion using various methods of pushing a stroller while running. METHODS:13 recreational runners ran behind a Thule Urban Glide 2 jogging stroller suspended over an instrumented treadmill (Bertec, Inc, Columbus, OH). The study measured running in four different conditions: one with the participant’s right hand on the handlebar (RH), another with left hand on the handlebar (LH), one with both hands on handlebar (BH), and running without the stroller (CON). The first three conditions were randomized between participants, but the final condition was always performed without the stroller. Biomechanical data were collected with Vicon Nexus 2.3 (Vicon, Inc., Oxford, UK) and processed through Visual 3D (5.0, C-Motion, Inc., Germantown, MD, USA). A repeated measures ANOVA was utilized to compare peak angles of the pelvis in all three planes of motion. RESULTS: The pelvis was more anteriorly tilted in the BH condition (25 ± 1.9°) compared to CON (23 ± 1.7°, p=0.01), RH (22 ± 2.0°, p<0.01) and the LH conditions (24 ± 1.9°, p=0.04). In the transverse plane only the LH (5.2 ± 0.75) and CON (5.6 ± 0.83°) conditions were similar. There was more right to left rotation of the pelvis in the BH condition (7.8 ± 0.7°) compared to the CON (p=0.02), RH (3.1 ± 0.88°, p<0.01) and the LH conditions (p=0.02). The RH was different from all other conditions for left to right rotation (p<0.01). There were no difference between conditions for pelvic obliquity, motion in the frontal plane, for any of the four conditions. CONCLUSIONS: Running while behind a stroller alters some aspects of pelvic motion when compared with regular running. This is true for both one and two-handed stroller running. Pelvic motion plays a role in many aspects of running and altered mechanics in this region may lead to increased risk for injuries of the low back or lower extremity. 748 May 29 3:55 PM - 4:05 PM Immediate Effects of a Textured Insole on Running Biomechanics in Rearfoot Strikers Ann-Uriel H. Knausenberger 1 , Matthew F. Moran 1 , Justin C. Wager 2 . 1 Sacred Heart University, Fairfield, CT. 2 New Balance Sports Research Laboratory, Lawrence, MA. (No relationships reported) Running biomechanics are influenced by footwear and insole properties. The sensorimotor system, specifically subcutaneous plantar receptors, play a role in initiating adaptive gait mechanics. Designed to increase afferent signaling via plantar surface deformation, an insole inlaid with a textured heel-plate (TI) is proposed to precipitate gait changes during running. PURPOSE: To compare biomechanical patterns during over-ground running between the TI and a non-textured insole (NI). METHODS: Nineteen rearfoot strike runners (24.9 +/- 5.7 yo; 6 M, 13 F) performed twenty, 35-meter running trials under TI and NI conditions. Insole conditions were counter-balanced, and velocity was controlled (±5%). Plantar sensation was assessed using a 3.61g monofilament applied to seven standardized sites. Thirty-six reflective markers (dia.=16-20 cm), affixed bilaterally to lower extremity bony landmarks, were tracked via a 10-camera motion analysis system (120 Hz), and ground reaction forces were collected (1200 Hz). Visual3D and a custom Matlab script were used to determine lower extremity kinematics and kinetic variables. Perceived insole comfort was scored with a visual analogue scale. Dependent variables were analyzed using paired- samples t-tests; for data that violated assumptions, a Wilcoxon signed-rank test was utilized. RESULTS: Kinetic measures did not differ significantly between insole conditions; impact peak (NI=1.46±0.58 BW, TI=1.50±0.44 BW, p=.74), active peak (NI=2.37±0.16 BW, TI=2.35±0.15 BW, p=.28), loading rate (NI=35.9±12.2 BW/s, TI=34.0±13.2 BW/s, p=.26), peak braking (NI=-.31±.03 BW, TI=-.32±.06 BW, p=.69) and peak propulsion (NI=.27±.05 BW, TI=.27±.04 BW, p=.28). A significant increase in ankle internal rotation angle at initial contact was observed in the TI versus NI (NI=5.9 ± 5.9 o ; TI=7.3 ± 5.9 o ; p=.01, d=.24), however, no other significant kinematic differences were detected. NI (mdn=9.0) was rated as significantly more comfortable than TI (mdn=8.0) (z=-2.026 p=.04). CONCLUSION: Because kinematic and kinetic variables did not vary significantly between the TI and NI, the efficacy of the TI as a method of immediately altering running mechanics in a population of rear foot strikers should be further investigated. Insoles provided by: ShoeCue Inc (ShoeCue, Orleans, MA) 749 May 29 4:05 PM - 4:15 PM Comparison of Running Gait Kinematics Among College Students With and Without ASD Brian Rios 1 , Michael Salazar 1 , Teri Todd 1 , Melissa Mache 2 , Danielle N. Jarvis 1 . 1 California State University Northridge, Northridge, CA. 2 California State University Chico, Chico, CA. Email: brian.rios.613@my.csun.edu (No relationships reported) BACKGROUND: Autism Spectrum Disorder (ASD) is a developmental disability associated with difficulties in social communication and the presence of repetitive behaviors. Along with social impairments, motor deficits can be identified as another characteristic associated with ASD. Although gait deviations have been looked at in children with ASD, not much is known about how gait deviations may persist in college students with ASD. PURPOSE: To compare running gait deviations between college students with and without ASD METHODS: Ten college students participated in this study. Five participants had a diagnosis of ASD (age 21.5±2.9 years) and 5 participants did not have an ASD diagnosis and comprised a healthy control (CON) group (age 24±3.5 years). Each participant performed 3 running trials over a 7.62 meter distance. Kinematic data were collecting using a 12-camera 3D motion capture system. Stance and swing phase time, and hip, knee, and ankle angles at initial contact and at toe off were extracted for further analysis. Variables were compared between groups using independent t-tests. As this is a preliminary analysis with a small sample size, significance was set at α≤0.10. RESULTS: Individuals with and without ASD had similar lower extremity joint angles at initial contact (hip 60.21±13.13° ASD, 53.60±16.07° CON, p=0.53; knee 37.10±12.40° ASD, 43.48±3.30° CON, p=0.36; ankle 17.66±4.89° ASD, 18.18±6.47° CON, p=0.90). The two groups also demonstrated similar knee and ankle angles at toe off (knee 24.51±3.86° ASD, Copyright © 2019 by the American College of Sports Medicine. Unauthorized reproduction of this article is prohibited.