Documentation Index
Fetch the complete documentation index at: https://docs.uplift.ai/llms.txt
Use this file to discover all available pages before exploring further.
Overview
Walking gait analysis evaluates the biomechanics of walking motion, including stride patterns, ground contact phases, and joint kinematics during the walking cycle.
Dimensions
Required Inputs for processing:
- surface: the type of ground on which the person walks [‘treadmill’, ‘other’]
Instructions
Variables
Output Variables for gait analysis:
Events
| Evemt | Description | Column Name |
|---|
| Right Foot Strike | when the right foot initially contacts the ground | - |
| Right Foot Off | when the right foot leaves the ground | - |
| Left Foot Strike | when the left foot contacts the ground | - |
| Left Foot Off | when the left toe leaves the ground | - |
Phases and Stages of Gait Walking
| Phase | Start | End | Description |
|---|
| Stance | Foot Strike | Foot Off | the period between foot strike and foot off, when the foot is in contact with the ground |
| Swing | Foot Off | Foot Strike | the period between foot off and foot strike, when the foot is not in contact with the ground |
| Leading Double Support | Foot Strike | Opposite Foot Off | when both feet are in contact with the ground and the step side is in early stance (just after foot strike) |
| Single Limb Support | Opposite Foot Off | Opposite Foot Strike | when only one foot is in contact with the ground |
| Trailing Double Support | Opposite Foot Strike | Foot Off | when both feet are in contact with the ground and the step side is in late stance (just before foot off) |
Discrete Metrics
| Metric | Data Type | Units | Description |
|---|
| Percent Gait Cycle Left | Float | % | Relative percent of the gait cycle (left foot strike to left foot strike) |
| Percent Gait Cycle Right | Float | % | Relative percent of the gait cycle (right foot strike to right foot strike) |
| Side | String | N/A | Side of the Gait Cycle [‘left’, ‘right’] |
| Side Gait Cycle Number | Int | number | Gait cycle index for the trial. Left and Right gait cycles are counted separately |
| Opposite Foot Off Percent | Float | % | Relative % of the gait cycle at which the opposite foot off event occurs |
| Opposite Foot Strike Percent | Float | % | Relative % of the gait cycle at which the opposite foot strike event occurs |
| Stance Percent | Float | % | Relative % duration of the gait cycle for stance phase |
| Swing Percent | Float | % | Relative % duration of the gait cycle for swing phase |
| Stride Duration | Float | seconds | Time between same-side heel strikes |
| Walking Speed | Float | m/s | Average walking speed for the gait cycle |
| Stride Length | Float | meters | Distance between same foot heel strikes |
| Step Width | Float | meters | Side-side distance between feet |
| Step Length | Float | meters | Distance travelled between contralateral heel strikes |
| Ankle Push Off Range of Motion | Float | Degrees | The functional amount of ankle extension used during push off, range of motion from peak flexion during stance to extension angle at foot off event. Does not consider follow through extension when the foot is no longer in contact with the ground. |
| Knee Absorption Range of Motion | Float | Degrees | The functional amount of knee flexion used during weight acceptance, range of motion from foot strike event until peak flexion angle in the first half of stance phase. |
| Foot Progression Angle | Float | Degrees | The outward rotation of the foot (transverse plane) relative to the direction of walking. |
Notes
- Kinematic data typically captured at 120Hz for Walking Analysis
