ground reaction force

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force plate

a device for measuring the force between a body or object and the ground (the ground reaction force). Often constructed from strain gauges or piezo-electric transducers. Also known as a force platform.

ground reaction force

; GRF force offered by support surface, equalling and opposing force due to body mass passing through the foot to the ground surface; GRF is resolved into vertical (counteracting body weight) and horizontal (leading to forward movement) components
References in periodicals archive ?
1983) Variations in ground reaction force parameters at different running speeds.
During the contact phase, the ground reaction force (GRF) generated is the sum of body weight and all force that accelerate and/or decelerate the body mass.
Specifically high-impact exercises, activities causing high vertical ground reaction forces including maximal jumping and leaping to vertical and onward directions (Nikander et al.
Golf shoe design assessments have principally used ground reaction force measures as an investigative tool.
When this action is performed continuously and repeatedly, the corresponding ground reaction force (GRF) time history is typically a series of distinctive pulses (Figure 1), which are the reaction to the force the body exerts on the supporting ground during the 'contact phase' of jumping.
Altered neuromuscular control due to fatigue may be reflected by changes in electromyographic (EMG) activity, joint kinematics, and vertical ground reaction force magnitudes, and these changes also may be observed as an altered lower extremity stiffness during landing (James et al.
First the vertical ground reaction force was filtered with a recursive Butterworth filter (4th order, 50 Hz lowpass), to eliminate the influence of potential high frequency peaks in the data.
As a consequence, ground reaction forces during repetitive tasks, particularly running, have been studied and a number of aspects of force exposure have been highlighted as contributors to overuse injury development including the magnitude of impact forces (Nigg et al.
Williams and Sih (1998), who investigated ground reaction forces when wearing different types of golf shoes on artificial turf, highlighted the need for shoe assessments to be made on a natural grass surface.
the delivery treadmill to evaluate the ground reaction forces with belts in tandem with the installation, commissioning and training of employees in the service and delivery platforms mounted in a treadmill to assess the ground reaction forces, including installation, commissioning and training of staff in handling.
During a turn, modulation of ankle impedance in the sagittal and frontal planes plays a major role in controlling lateral and propulsive ground reaction forces in order to accelerate the body's center of mass along the gait path; thus, during a turning step, lateral and propulsive impulses are larger than during a straight step [17].
It should also allow good proprioception and natural dissipation of ground reaction forces.