> ## Documentation Index
> Fetch the complete documentation index at: https://docs.uplift.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Trunk Lateral Tilt at Release

> Lateral (left/right) trunk tilt at ball release.

## 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 position 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