Documentation Index
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Technical Details
- Variable Type: Discrete Metric
- Data Type: Float
- Units: °
- Column Name:
trunk_angle_to_plate_foot_contact - Aggregation: mean
- Precision: 0
- Measurement: Trunk rotation (twist or transverse) angle at foot contact
- Reference: 0° = facing home plate
- Timing: At foot contact event
- Typical Range: 71 – 105 °
- Optimal Direction: Middle — moderate values are optimal
Description
Trunk angle to plate foot contact measures the trunk rotation angle relative to home plate at the instant of lead foot contact, where facing home plate is 0 degrees.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 | 87 – 115 ° | 72 | 87 | 101 | 115 | 126 |
| High School | 75 – 107 ° | 59 | 75 | 90 | 107 | 120 |
| College | 69 – 95 ° | 59 | 69 | 81 | 95 | 106 |
| Professional | 51 – 82 ° | 27 | 51 | 70 | 82 | 95 |
| Broad (All Levels) | 71 – 105 ° | 53 | 71 | 88 | 105 | 116 |
Use Cases
- Trunk position assessment at foot contact
- Timing evaluation