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6. Gait Parameter Overview

Below you can find the description of the spatio-temporal output parameters of the PhysiGait

Lab system.

6.1

Essentials

The report directly accessible after the gait test from the tablet contains 3 essential gait

parameters with a colour-bar situating the result with respect to reference data. The values

are based on the result of the right foot of the patient.

Speed [m/s], the walking stride velocity is the mean speed of forward walking,

calculated in meters per second.

Variability [%] is the coefficient of variation of cycle duration in percent. It is

calculated as SD/mean and is only computed when 10 gait cycles or more are

analysed.

Asymmetry [%] is the ratio of swing which compares the time in the air for the two

feet, in percent. A perfect symmetry outputs a value of 0%. The asymmetry is

calculated as: =

6.2

Temporal Analysis

Cycle time [s] is the absolute recording time when the heel strikes the

ground. If you are recording a trial with several exercises of particular

duration (30s, 1min, ...), it can help you find the moment where the patient

changes exercise within the entire trial. It is however still recommended to

create one file per trial as mentioned in section 3.3.

Cycle duration [s] is the duration of one cycle (from heel strike to heel

strike of the same side).

Cadence [steps/min] is the number of cycles in a minute. Cadence is

different from speed, since a small person may have to walk with a higher

cadence to have the same speed than a much taller person.

Stance [%] is the portion of the cycle during which part of the foot touches

the ground. Normal stance is around 60% of gait cycle duration.

Swing [%] is the portion of the cycle during which the foot is in the air and

does not touch the ground. Normal swing is about 40% of gait cycle duration.

Loading phase [%] is the portion of the stance between the heel strike and

the foot being flat on the ground.

PhysiGait Lab user manual v1.3.1 Date: 29.04.2019

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∗ 100%

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