Trunk Coil

Max rotation angle that the trunk turns away from the pitcher. This measures the loading of the trunk during the swing.

Technical Details

• Variable Type: Discrete Metric
• Data Type: Float
• Units: degrees
• Column Name: trunk_coil
• Measurement: Maximum trunk rotation away from pitcher
• Reference: 0° = neutrally square to the pitcher
• Typical Range: 20-40 degrees

Description

Trunk coil measures the maximum rotation angle of the trunk away from the pitcher, indicating the loading and preparation of the core for power generation. Neutrally sqare towards the pitcher (where the shoulders are in line with the pitch) would be 0 deg.

Use Cases

• Core preparation assessment
• Rotation evaluation