# What is meant by Centre of pressure?

## What is meant by Centre of pressure?

The center of pressure is the point where the total sum of a pressure field acts on a body, causing a force to act through that point. The total force vector acting at the center of pressure is the value of the integrated vectorial pressure field.

## What is the relationship between center of pressure and center of gravity?

We call the average location of the pressure variation the center of pressure in the same way that we call the average location of the weight of an object the center of gravity. The aerodynamic force can then be resolved into two components, lift and drag, which act through the center of pressure in flight.

## How is GRF measured?

The GRF is normally measured by a force-plate. Figure 1a shows the reference frame of the force-plate, with the Z- axis being the vertical. The interaction between the body and the ground occurs through the foot as shown in Figures 1b, which shows the reaction force vectors acting on small areas.

## What is ground reaction force in gait?

In clinical gait analysis, ground reaction force (GRF) is the gait parameter which can validate the state of disorder of the patient’s movement. Based on model predictions of the body’s COG trajectory during walking, algorithms were developed to determine spatio-temporal gait parameters related to GRF characteristics.

## How is the center of pressure related to ground reaction force?

The ground reaction force vector represents the sum of all forces acting between a physical object and its supporting surface. Analysis of the center of pressure is common in studies on human postural control and gait. It is thought that changes in motor control may be reflected in changes in the center of pressure.

## What makes up the ground reaction force vector?

The ground reaction force vector represents the sum of all forces acting between a physical object and its supporting surface. Analysis of the center of pressure is common in studies on human postural control and gait.

## Why is the ground reaction force the same as the FR?

Because the ground reaction force is equal and opposite, its vector’s line of application is the same as that of Fr, and it has the same effect on the body and its joints. The GRFV combines both gravity’s effect on the body and the effects of the body’s movement and acceleration (change of velocity) in three planes of reference.