Documentation Index
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Technical Details
- Variable Type: Discrete Metric
- Data Type: Float
- Units: °
- Column Name:
trunk_angle_to_plate_coil - Aggregation: mean
- Precision: 0
- Measurement: Maximum trunk rotation away from home plate prior to delivery
- Reference: 0° = facing home plate
- Typical Range: 112 – 132 °
- Optimal Direction: Higher is better
Description
Trunk angle to plate coil measures the maximum trunk rotation angle away from home plate prior to delivery, where facing home plate is 0 degrees. This represents the coil or loading phase of the trunk.Normative Ranges
Percentile distributions by competition level from the 2026 Q1 dataset; the optimal range spans the 75th–90th percentiles.| Population | Optimal Range (75th–90th) | 10th | 25th | 50th | 75th | 90th |
|---|---|---|---|---|---|---|
| Youth | 131 – 140 ° | 103 | 112 | 123 | 131 | 140 |
| High School | 133 – 143 ° | 107 | 117 | 125 | 133 | 143 |
| College | 133 – 139 ° | 111 | 118 | 126 | 133 | 139 |
| Professional | 119 – 135 ° | 86 | 100 | 110 | 119 | 135 |
| Broad (All Levels) | 132 – 140 ° | 102 | 112 | 123 | 132 | 140 |
Use Cases
- Trunk loading assessment
- Rotation analysis