How to read the overlay stack
Each still uses a single color for spine alignment, a second color for scapular rhythm, and a dotted line for optional wrist focus. The sequence is slow so you can compare frames.
Pause the session if a position feels unclear; send a timestamp through the contact page for clarification.
Accessibility of the diagrams
Patterns rely on stroke thickness and contrast ratios tested against the oat and indigo palette. If you rely on a screen reader, use the text alternative on each figure plus the caption track when viewing video.