Technical Details
- Variable Type: Discrete Metric
- Data Type: Float
- Units: degrees (°)
- Column Name:
contact_phase_trunk_tilt - Measurement: Lateral (side-side) trunk tilt at Apex (ball contact)
Description
Contact phase trunk tilt is the lateral trunk tilt at ball contact. It reflects posture at the moment of impact and can be compared with Loading Phase Trunk Tilt to assess trunk motion through the serve. Negative values indicate leaning to the dominant side, positive values indicate leaning to the non-dominant side.Use Cases
- Posture at contact
- Trunk control and consistency
- Comparison with loading-phase trunk tilt