> ## 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 Forward Tilt (Release)

> Forward trunk tilt at ball release.

## Technical Details

* **Variable Type:** Discrete Metric
* **Data Type:** Float
* **Units:** °
* **Column Name:** `trunk_forward_tilt_at_ball_release`
* **Aggregation:** mean
* **Precision:** 0
* **Measurement:** Sagittal plane trunk angle relative to the global coordinate system
* **Timing:** At ball release event
* **Typical Range:** 20 – 32 °
* **Optimal Direction:** Higher is better

## Description

Trunk forward tilt at ball release measures the forward lean 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 75th–90th percentiles.

| Population         | Optimal Range (75th–90th) | 10th | 25th | 50th | 75th | 90th |
| ------------------ | ------------------------- | :--: | :--: | :--: | :--: | :--: |
| Youth              | 28 – 33 °                 |  14  |  19  |  25  |  28  |  33  |
| High School        | 32 – 36 °                 |  14  |  20  |  27  |  32  |  36  |
| College            | 34 – 39 °                 |  18  |  25  |  29  |  34  |  39  |
| Professional       | 34 – 42 °                 |  13  |  18  |  27  |  34  |  42  |
| Broad (All Levels) | 32 – 37 °                 |  14  |  20  |  27  |  32  |  37  |

## Use Cases

* Trunk position assessment at release
* Posture evaluation