Gait
Gait Analysis
Video-based gait analysis in frontal and sagittal planes.
Modules
- Frontal düzlem
- Sagittal düzlem
Gait Analysis uses AI to track body joint points on a walking video and examines the gait pattern in two planes. In the frontal plane (front/back) it assesses trunk, pelvis and knee alignment; in the sagittal plane (side) it assesses hip, knee and ankle angles and step characteristics.
What Is It Used For?
- Objectively recording deviations and asymmetries in the gait pattern
- Tracking gait progress in orthopaedic or neurological rehabilitation
- Following weight-bearing and gait training after surgery
- Comparing the effect of walking aids, orthoses or insoles
Measured Parameters
- Frontal plane: lateral trunk lean, pelvic drop, knee valgus/varus alignment, step width
- Sagittal plane: hip, knee and ankle angles through the gait cycle, forward trunk lean
- Step length and cadence (steps per minute)
- Left-right step symmetry
Setup and Camera Placement
- For the frontal plane, place the camera at the end of the walkway; the client walks towards and away from the camera.
- For the sagittal plane, place the camera at the middle of the walkway, perpendicular to it and about 3–4 metres away.
- The camera should be fixed at hip height with the whole body in frame.
- A flat, unobstructed walkway of at least 5–6 metres is needed.
Tips for Accurate Measurement
- Allow one or two practice walks; the client should forget the camera and walk naturally.
- Prefer shorts and a fitted top so the hip, knee and ankle are visible.
- Use the same condition each time: barefoot or the same shoes, the same walking aid.
- The first and last steps include acceleration and deceleration; mid-walk steps are better for analysis.
- Use a plain background and good lighting, with no other people in frame.
How Is the Test Done?
- Select the client and the analysis plane (frontal or sagittal).
- Fix the camera in the position appropriate for that plane.
- Start recording; the client walks at a natural, self-selected speed.
- Repeat the walk for a few passes, then stop recording.
- Review the results, save them to the profile and repeat for the other plane if needed.
What Will I See on the Results Screen?
- Joint points and a skeleton overlay on the video
- Angle values for the selected plane and graphs of change through the gait cycle
- Step parameters and left-right comparison
- A record stored in the profile and comparable with earlier analyses
Interpreting the Results
- Differences between right and left sides and change in the same client over time are more informative than a single value.
- Marked pelvic drop or lateral trunk lean during stance can be considered in terms of control around the hip.
- Reduced knee or ankle motion may relate to pain, restriction or a compensation strategy and should be considered alongside clinical examination.
- Walking speed affects all parameters; comparisons should be made at similar speeds. Two-dimensional video analysis does not replace laboratory-based three-dimensional analysis.
Clinical Use Example
For a client receiving gait training after total hip replacement, pelvic drop and trunk lean are recorded every four weeks with frontal plane analysis. A reduction in these values is used to follow how the hip abductor strengthening programme carries over into walking.