Technical Details
- Variable Type: Movement Flag
- Data Type: Integer
- Units: N/A
- Column Name:
contact_phase_open_pelvis_rotation - Optimal Direction: Lower is better
- Unknown Value: -1
- Measurement: Pelvis rotation at Apex
- Threshold: Pelvis rotation greater than -30°
Description
Contact phase open pelvis rotation is a binary indicator that flags when the pelvis has rotated too far towards the serve direction (past -30°) at the time of ball contact This indicates the hips are “opening up” too early relative to the arm and ball.Use Cases
- Rotational sequencing assessment
- Mechanics evaluation