ground reaction force

(redirected from Ground reaction)

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 ?
We use this to measure the ground reaction force for every step made against the ground.
Completely wireless and mobile system of thin measuring inserts (at least 6 pairs in different sizes: 1 x 34, 35 x 1 x 36/37, 1 x 38/39, 1 x 40/41, 1 x 42/43, 1 x 44 / 45 for flat pressure and ground reaction forces measurement and balance measurement - suitable for all types of footwear.
This results in a high ground reaction force in the static phase.
Plantar pressures have also been evaluated in the Zuni Exercise[R] system reporting a significant reduction in ground reaction forces during walking and running [12].
We acknowledge that there are limitations in subjectively quantifying this criterion, but feel it is a critical component of the TJA as loud landings are likely indicative of excessive ground reaction forces and poor force dissipation strategies when landing.
Jump height (JH), power (P), and ground reaction force (GRF) were assessed using a force platform.
Kinetic variables (vertical, medio-lateral [ML], antero-posterior [AP] maximum ground reaction forces [GRF], and center of pressure [COP] ML and AP) were measured by a Bertec force platform at 1,000 Hz with participants S and BF.
Similar results have been previously reported for the ground reaction force between individuals with normal and flat feet.
High ground reaction forces encountered in running and jumping should be countered with good quality shoes and judicious selection of training surfaces19.
When you think about it, every step you take starts with your feet, as the ground reaction forces that go through your body when you walk start underfoot," says James Naylor, national sales manager for orthopaedic footwear specialists SOLE UK.
HEART AND SOLE "WHEN you think about it, every step you take starts with your feet, as the ground reaction forces that go through your body when you walk start underfoot," said James Naylor, national sales manager for orthopaedic footwear specialists SOLE UK.
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].