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Lower Extremity Biomechanical Differences Between Female Dancers and Soccer Players

Hayley M. Ericksen and Rachele E. Vogelpohl

factors that may increase one’s risk of ACL injury. Jump-landing biomechanics is a factor which is potentially modifiable, and biomechanical differences in jump-landing have been reported prospectively in those who have later gone on to tear their ACL. 7 Professional ballet dancers have been found to

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Biomechanical Determinants of the Reactive Strength Index During Drop Jumps

Kristof Kipp, Michael T. Kiely, Matthew D. Giordanelli, Philip J. Malloy, and Christopher F. Geiser

-sectional differences and monitoring longitudinal changes in maximal dynamic lower-extremity performance. Although the RSI provides simple insight into dynamic lower-extremity performance during a DJ, not much is known about its biomechanical determinants. Beyond the variables of jump height and ground-contact time

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Gait Biomechanics Following Taping and Bracing in Patients With Chronic Ankle Instability: A Critically Appraised Topic

Kimmery Migel and Erik Wikstrom

to contribute to aberrant gait biomechanics observed in those with CAI. More specifically, those with CAI demonstrate excessive inversion at heel strike and throughout stance as well as excessive inversion and plantar flexion in the swing phase of gait. 2 These impairments increase the risk of

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The Effects of Walking Workstations on Biomechanical Performance

Daniel M. Grindle, Lauren Baker, Mike Furr, Tim Puterio, Brian Knarr, and Jill Higginson

while they work. Currently, there is a lack of research on the gait biomechanics of walking workstation users. Working while walking may alter movement patterns, as previous studies have demonstrated that the performance of a secondary task during walking alters gait 12 – 14 especially in older

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Concussive Biomechanics in a Women’s Soccer Player: A Validation Clinical Case Report

Hallie D. Sayre and Tom G. Bowman

to understand all aspects of a concussion including identification, evaluation, and the return to play process. 2 A concussion is defined as “a traumatic brain injury induced by biomechanical forces.” 3 Typically, concussions occur from a force applied directly or indirectly to the skull that then

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Determinants of 1500-m Front-Crawl Swimming Performance in Triathletes: Influence of Physiological and Biomechanical Variables

Óscar López-Belmonte, Jesús J. Ruiz-Navarro, Ana Gay, Francisco Cuenca-Fernández, Roberto Cejuela, and Raúl Arellano

, swimming has been less studied compared with cycling and running sections, 15 probably because of the complexity of assessing in the aquatic environment. In swimming, biomechanical analysis is crucial to determine relationships between performance and physiological variables. 16 The assessment of the

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Using Monte Carlo Simulation to Propagate Processing Parameter Uncertainty to the Statistical Analyses of Biomechanical Trajectories

Todd C. Pataky

arms, propagate to uncertainty in final results. Plausible value ranges for these biomechanical model parameters can generally be determined through in vitro and/or in vivo experimentation. Although not generally appearing in the literature, MC simulations can also handle uncertainty in nonmeasurable

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Vertical Jump Biomechanics Altered With Virtual Overhead Goal

Kevin R. Ford, Anh-Dung Nguyen, Eric J. Hegedus, and Jeffrey B. Taylor

Virtual environments with real-time feedback can simulate extrinsic goals that mimic real life conditions. The purpose was to compare jump performance and biomechanics with a physical overhead goal (POG) and with a virtual overhead goal (VOG). Fourteen female subjects participated (age: 18.8 ± 1.1 years, height: 163.2 ± 8.1 cm, weight 63.0 ± 7.9 kg). Sagittal plane trunk, hip, and knee biomechanics were calculated during the landing and take-off phases of drop vertical jump with different goal conditions. Repeated-measures ANOVAs determined differences between goal conditions. Vertical jump height displacement was not different during VOG compared with POG. Greater hip extensor moment (P < .001*) and hip angular impulse (P < .004*) were found during VOG compared with POG. Subjects landed more erect with less magnitude of trunk flexion (P = .002*) during POG compared with VOG. A virtual target can optimize jump height and promote increased hip moments and trunk flexion. This may be a useful alternative to physical targets to improve performance during certain biomechanical testing, screening, and training conditions.

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Biomechanics: 40 Years On

Joseph Hamill, Kathleen M. Knutzen, and Timothy R. Derrick

As a subdiscipline within the field of kinesiology, biomechanics is still a relatively new area of study. With roots in physical education in the 1970s ( Nelson, 1973 ), biomechanics was initially concerned with the study of sports techniques. Subsequently, biomechanics has developed into an

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The Utilization of Biomechanics to Understand and Manage the Acute and Long-term Effects of Concussion

Jay L. Alberts and Susan M. Linder

The acute and long-term effects of concussive and subconcussive head impacts on brain health have gained tremendous attention over the past five years. The treatment and management of concussion involves multiple providers from multiple disciplines and backgrounds. Varied backgrounds and approaches to assessing cognitive and motor function before and post-concussion are limiting factors in the efficient and effective management of concussion as discipline-specific rating scales and assessments serve as a barrier to effective patient hand-offs between providers. Combining principles of motor behavior with biomechanical approaches to data analysis has the potential to improve the continuity of care across the multiple providers managing athletes with concussion. Biomechanical measures have been developed and validated using mobile devices to provide objective and quantitative assessments of information processing, working memory, set switching, and postural stability. These biomechanical outcomes are integral to a clinical management algorithm, the Concussion Care Path, currently used across the Cleveland Clinic Health System. The objective outcomes provide a common data set that all providers in the spectrum of care can access which facilitates communication and the practice of medicine and in understanding the acute and long-term effects of concussion and subconcussive exposure on neurological function.