Documentation Index
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Technical Details
- Variable Type: Discrete Metric
- Data Type: Float
- Units: °
- Column Name:
trunk_lateral_tilt_at_ball_release - Aggregation: mean
- Precision: 0
- Measurement: Frontal plane trunk angle relative to the global coordinate system
- Timing: At ball release event
- Typical Range: 9 – 21 °
- Optimal Direction: Middle — moderate values are optimal
Description
Trunk lateral tilt at ball release measures the side-to-side (left/right) tilt of the trunk at the instant of ball release during the pitch. This is an indicator of body positon at a critical point in time, useful for measuring proper positioning and consistency.Normative Ranges
Percentile distributions by competition level from the 2026 Q1 dataset; the optimal range spans the 25th–75th percentiles.| Population | Optimal Range (25th–75th) | 10th | 25th | 50th | 75th | 90th |
|---|---|---|---|---|---|---|
| Youth | 10 – 23 ° | 5 | 10 | 16 | 23 | 28 |
| High School | 10 – 21 ° | 4 | 10 | 15 | 21 | 25 |
| College | 8 – 21 ° | 3 | 8 | 15 | 21 | 26 |
| Professional | 5 – 18 ° | -2 | 5 | 13 | 18 | 22 |
| Broad (All Levels) | 9 – 21 ° | 4 | 9 | 15 | 21 | 26 |
Use Cases
- Trunk alignment assessment at release
- Posture evaluation