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 ?
Ground reaction forces were collected using a force plate (Advanced Mechanical Technology, Inc., Water-town, Massachusetts, USA) operating at 2,000 Hz.
(2011) found that high-level WC ski racers better controlled the dissipation of potential energy, and could more effectively reduce ground reaction forces compared to low-level performers.
Also, it has shown that unloading the body weight on anti-gravity treadmill reduces ground reaction force and knee force during weight-bearing activities (7-10).
Caption: Figure 2: Vertical ground reaction forces when a representative subject landed from three different heights.
[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.
Kautz, "Anterior-posterior ground reaction forces as a measure of paretic leg contribution in hemiparetic walking," Stroke, vol.
where F = [[[f.sup.T.sub.1], [f.sup.T.sub.2].sup.T] is a vector of the ground reaction forces acting on the left foot and the right foot.
During walking or running, human foot exerts a force on the surface, which in turn exerts an equal and opposite force that is termed as ground reaction force. The ground reaction forces and plantar pressure measurements of the foot are used to study the stress concentration effects on the plantar surface.
Nadal, "Residual analysis of ground reaction forces simulation during gait using neural networks with different configurations," in 2015 37th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), pp.
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).
One is the occurrence of increased ground contact times caused by the shock absorption effect of the sprung belt platform which, in turn, reduces ground reaction forces (GRF) and this effect limits elastic recoil within the lower legs as well as reducing the need for quick stabilizing strength of the lateral stabilizers.