Joint Path Tracking & Velocity
Introduction
With Yogger, users can track the path of joints throughout a movement in motion capture playback. The joint path tracking feature allows users to visualize the path of a joint, and estimate the relative velocity of the joint throughout the movement.
Location: Once a video is recorded or uploaded, the joint path tracking is located in the playback view. In playback view, enable the joint path tracking feature by clicking the ‘path’ icon on the left-hand side. From here, select which joints you would like to see the paths of and press `GO`.
Purpose and Functionality
Joint path tracking allows the user understand the path of a motion. When enabled during playback, the joint path tracking will appear as the video plays. As the player plays, a path will be drawn with green indicating slower movement and red indicating a faster movement. Along the line, a label with the maximum velocity of each point will appear, and may move if a new max velocity occurs.
How to Use
Navigate to playback view and press the 'path' icon. This will open a menu for joint path tracking selection.
Once a joint or multiple joint paths are selected, the joint paths will be drawn as a user plays through a movement. To redraw the joint paths, you can rewind the video via the playback controls. To deselect joint paths entirely, go back to the selection menu and press "Clear".
Tips and Best Practices
Joint path tracking can be a great tool to better understand a user's movement. Use it to see where joints are moving faster, or which joints are moving first.
- Identify Compensation Patterns: Detect when other joints or body segments are taking over due to weakness, pain, or habit.
- Detect Early Fatigue or Loss of Form: Track how joint paths change across reps or sets as fatigue sets in.
- Validate Exercise Execution: Confirm whether an athlete is performing a movement correctly (e.g., squats, lunges, throws).
- Progress Monitoring in Rehab: Compare joint paths from early rehab to later stages to assess recovery progress.
- Support Return-to-Play Decisions: Joint path symmetry and consistency can inform readiness to return to sport.