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Showing 1 to 20 of 87 for “"ground reaction forces"”.
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A comparison of ground reaction forces during running and form skipping
… The purpose of this study was to investigate the ground reaction forces (GRF) during form skipping and running. Healthy subjects (N = 9) ran and skipped across the force platform at a speed of 3.83 m·s--1 (+/-5%) and 1.75 m·s--1 (+/-5%) respectively. Three GRF variables were analyzed: …
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Biomechanical loads in running-based sports: estimating ground reaction forces from segmental accelerations
… quantified and, therefore, largely unexplored. Ground reaction force (GRF) is a well-established measure of external whole-body biomechanical loading, which drives and contributes to the internal stresses on e.g. muscles, tendons and bones. GRF might thus be used to further understand the …
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Ground Reaction Forces Are Predicted With Functional and Clinical Tests in a Healthy Collegiate Population
… This study aimed to generate models predicting Ground Reaction Forces (GRFs), an established predictor of ACL injury incidence, from practical functional and clinical tests. Participants: Forty-two healthy, active college age individuals (21 females, age 20.667±1.461; 70.702±2.363cm; …
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Effects of a 30-minute walk on ground reaction forces during walking with an external load
… on vertical GRF was not rejected. Overall, forces were elevated during load carrying, which may result in added stress on anatomical structures.
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The Effects of Epidural Deracoxib on the Ground Reaction Forces in an Acute Stifle Synovitis Model
Objective: To evaluate epidurally administered deracoxib and its ability to mediate clinical signs and effects of a sodium urate crystal-induced stifle synovitis in dogs, and to compare the effects of epidural versus subcutaneously injected deracoxib. Study Design: Experimental, randomized, …
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The association of osteopathic tests and diagnoses of sacroiliac joint dysfunction with ground reaction forces during gait
… sacroiliac joint during gait is to absorb both ground reaction forces and shear forces during movement. Analysing the gait of patients with sacroiliac joint dysfunction is vital if there is to be an increase in the understanding of its role in low back and pelvic pain and related dysfunctions. …
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The prevalence of patellar tendinopathy in elite academy rugby players: a role for measuring ground reaction forces?
… weight or playing position, 4) whether vertical ground reaction force (VGRF) data from drop-landing tasks can predict the presence of patellar tendon disease and avoid the need for costly ultrasound screening.<br/><br/>A group of academy rugby players from Wales (n=46) received a combination of …
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Ground reaction forces and control of centre of mass motion during gait : implications for intervention in cerebral palsy
… study aimed to improve the understanding of the ground reaction forces and motion of the CoM.<br/><br/><b>Objectives</b>: The principle objectives were to analyse the supporting forces of the CoM during gait in normal adults, children, and children with diplegic cerebral palsy, by examining the …
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Theoretical framework for predicting joint reaction and ground reaction forces in a dynamic pendulum tree model of human motion
… of superfluous coordinates are applied to find ground and joint reaction forces on the human body modeled as a general branched 2-D pendulum tree system with arbitrary segments and arbitrarily distributed point masses. A theoretical framework is established for predicting these constraint forces …
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Upper extremity vertical ground reaction forces during the back handspring skill in gymnastics: A comparison of various braced vs. unbraced techniques
… the performance of a back handspring. Vertical Ground Reaction Forces (VGRF) sustained at the hand, time to peak VGRF, and total time of hand contact on the force plate were assessed for each condition per subject. The results indicated no significant difference in the VGRF, time to peak VGRF, …
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An investigation to determine the effect of short-term low-dye taping on vertical ground reaction forces in asymptomatic PES planus, cavus and normal feet
A dissertation presented in partial fulfilment of the requirements for the Master's Degree in Technology: Chiropractic, Durban Institute of Technology,Durban, South Africa, 2005.
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Comparing pressure measurement systems and a force platform as tools for equine gait analysis
… force platforms. The force platform measures ground reaction forces in three orthogonal directions: mediolateral (Fx), craniocaudal (Fy) and vertical (Fz). Testing with force platforms has shown researchers that this technology is capable of providing accurate and reliable quantitative data …
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The Analgesic Effects of Epidural Ketamine in Dogs With a Chemically Induced Synovitis: A Comparison Between Pre - or Post - Injury Administration
… hours after the induction of synovitis. Vertical ground reaction forces were significantly decreased and numerical rating scale scores of total pain were significantly increased after the induction of synovitis in all dogs (p<0.05). No significant differences in ground reaction forces or total …
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Broadening the Capability of Kinetics Analysis in Biomechanics
… alternative upper designs in shoes might have on ground reaction force measures of performance. The second review and study evaluate methods of predicting ground reaction forces without the use of a force platform. A method of using effective forces and ways of improving its accuracy are evaluated …
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The effect of transverse rotation and longitudinal translation between prosthetic components during the gait of unilateral trans-tibial amputees
During stance phase of amputee gait, considerable forces are transmitted across the residual limb socket interface. These loads and associated gait patterns can be altered by introducing compliant elements into the prosthesis. However, previous studies have failed to adequately describe the effects …
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Concurrent simulation of a subject specific musculoskeletal model with anatomical knee
… understanding of ligament and joint contact forces during ambulatory activities. Thus, such models can be used to devise better injury prevention methods, as well as surgical and therapeutic treatments for musculoskeletal disorders. This manuscript presents a method to develop a subject …
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Kinetic and 3D Kinematic analysis of netball movements: with and without prophylactic knee bracing
… fast-paced games athletes are exposed to high ground reaction forces, contributing to lower body injury occurrence during landing and high patellofemoral loads. Knee braces, such as knee sleeves, are commonly used for patellofemoral pain; however the underlying mechanisms on the patellofemoral …
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Ground Reaction Force Differences Between Running Shoes, Racing Flats, and Distance Spikes in Runners
To measure the differences in ground reaction forces between running shoes, racing flats, and distance spikes, twenty intercollegiate distance runners ran across a force plate at 6.7m/s (for males) and 5.74m/s (for females) in each of the three types of shoes. In order to control for differences in …
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