How to record a video for walking analysis

AI-powered video analysis and gait biomechanics depend on clear, stable footage. To obtain accurate insights on posture, step symmetry, balance, and mobility, follow this step-by-step guide for optimal walking video recording.

1. Set Up the Right Recording Conditions

AiKYNETIX supports both indoor and outdoor video capture for walking gait analysis. Indoor recordings may take place in hallways, clinics, gyms, or open rooms. Outdoor recordings typically happen on a flat sidewalk or park pathway.

Since this guide focuses exclusively on walking not running or jogging the goal is to capture smooth, steady steps with no airborne phases, which are essential for analyzing balance, rhythm, and gait mechanics.

Key Considerations for Indoor vs. Outdoor Recording

• Indoor Challenges: – Narrow spaces can limit visibility. – Other people moving in the background may interfere with motion capture. Choose a clear, straight corridor or open area.

• Outdoor Challenges: – Uneven terrain can affect gait and distort results. – Changing light conditions may introduce shadows. Choose a flat surface and consistent lighting.

Recording Methods

• Assisted Recording: Someone holds the phone and keeps the walker centered as they move past the camera.

• Self-Recording: – Outdoor: Use a rotational pod or place the phone on a stable surface while the person walks back and forth. – Indoor: Use a tripod or position the phone against a stable object at the correct height.

📌 Tip: Enable a countdown timer (5–10 seconds) so the person has time to move into the frame before walking begins.

A stable camera setup is essential for clear, precise motion tracking.

2. Use the Right Recording Equipment

To ensure accurate AI motion tracking:

• Minimize Background Distractions – Avoid moving objects, clutter, pets, mirrors, or reflective surfaces.

• Optimize Lighting – Use soft, even lighting. Avoid strong shadows, flickering lights, and overexposed areas.

• Outdoor Comfort Conditions – Avoid rain, wind, or uneven terrain—these can alter natural walking patterns.

• Choose the Right Camera – Use the back camera whenever possible for higher clarity. Minimum recommended quality: 1080p at 30 fps. Walking does not require high-speed capture, but clear limb visibility is essential.

Proper recording conditions ensure the most accurate motion tracking and analysis.

3. Optimal Camera Positioning for Walking Analysis

• Camera Height: Place the camera at hip or waist level, aligning with the body's center of mass for accurate stride and alignment tracking.

• Maintain Distance: The entire body from head to feet must remain visible throughout the walk. Adjust distance based on indoor or outdoor space.

• Camera Stability: Use a tripod, pod, or stable surface. Even minor shaking can affect gait analysis.

• Best Angle: Film perpendicular to the walking path side view so joint angles and step symmetry are captured accurately.

📌 Illustration Notice: Provided images are only directional guides; exact measurements are not required.

Side-angle positioning allows accurate stride length, cadence, and ground contact analysis.

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4. Form & Attire

For the most reliable gait assessment:

• Walking Motion: Walk in a straight line, parallel to the camera. Maintain a natural pace, do not exaggerate strides or try to walk “better.” Avoid stopping, turning, or talking during the recording.

• Video Duration: A 20–40 second clip is ideal—long enough to capture several full gait cycles without unnecessary extra footage.

• Clothing Guidelines: Wear contrast-colored fitted clothing so the AI can clearly detect joint positions. Avoid long skirts, loose pants, coats, or accessories that may hide leg movement.

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5. Optimize Video Quality for AI Analysis

• Save videos in standard formats such as MP4 or MOV.

• Trim extra footage before and after the walking sequence.

• Avoid low-quality compression apps that blur edges and reduce motion clarity.

• Ensure feet remain fully visible at all times.