ground reaction forces

Also found in: Acronyms.

ground re·ac·tion forc·es

(grownd rē-akshŭn fōrsĕz)
Forces applied to the ground by a body that are returned to the body in equal magnitude but in an opposite direction; any force exerted by the ground on a body in contact with it.
References in periodicals archive ?
37] similarly evaluated the unweighting effects of the AlterG[R] finding a linear relationship between programmed unweighting parameters and ground reaction forces reporting an approximate reduction in maximum force of 8% and 20% at 80% and 60% body weight at a self-selected speed with other reports of a reduction in force during running [17] and walking [18] while maintaining similar metabolic consumption.
The straight walking tests were repeated for measuring the ground reaction forces for both the right and left feet at both slow and fast speeds (Figure 2(a) and (b), respectively).
To obtain the kinetic measurements of overground running the use of a force plate is utilized, where the subject is FORCED to alter gait during their running cycle to allow for readings to be taken (try if for yourself: start running and try to land on a designated fixed point without changing your stride length, cadence or body position) and, as for the treadmill, it's only been very recently that there has been successful development in a generation of treadmills that allows ground reaction force to be measured.
Leung and colleagues also examined the impact of UC Avrtvz JBL ground reaction forces, a significant difference between the two modes on the vertical component at the top of the shoes and insoles the shoes I saw the results of the present study is in agreement.
Further studies using experimental data to validate the muscle activation using other anthropometric data such as bone density values, EMG, Ground reaction forces, etc.
Soccer involves intermittent high-intensity activities like running at different intensities, sudden accelerations and stops, rapid changes in direction, jumps, kicking and punting that result in significant ground reaction forces on the skeleton.
As the ankle moves into plantarflexion, the knee flexes and the knee extensors act eccentrically to dampen the ground reaction forces.
Furthermore, this application was used to optimize the number of points required to obtain an optimal post processed signal from the ground reaction forces.
High-speed video in both the sagittal and frontal planes enabled the calculation of ground reaction forces, and this in turn allowed the calculation of torque at the knee joint.
High-speed video enabled calculation of ground reaction forces and torque at the knee joint.
As a result, ground reaction forces are not properly dissipated, thus leading to injury.
This system measures vertical force and ground reaction forces, underfoot pressure, temporal and special gait parameters, and provides insight into muscle innervations, symmetry and coordination.