Technical Details
- Variable Type: Discrete Metric
- Data Type: Float
- Units: degrees (°)
- Column Name:
pelvis_coil - Measurement: Maximum pelvis twist rotation away from the serve direction during the preparation/loading phase
- reflects how much the pelvis is “coiled up” before uncoiling toward contact
Description
Pelvis coil is the maximum twist rotation of the pelvis away from the serve direction during the early phases of the serve. It reflects lower-body preloading before the acceleration phase and contributes to Pelvis Stretch (twist range of motion).Use Cases
- Lower-body coiling and loading assessment
- Pelvis contribution to kinetic chain
- Comparison with trunk coil and stretch metrics