> ## 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.

# Shoulder Rotation Plane Tilt

> Amount of trunk tilt (+ = tilting towards the pitcher) to reach the average plane of rotation of the shoulders. This measures the lateral (side-side) trunk posture for optimal swing mechanics.

## Technical Details

* **Variable Type:** Discrete Metric
* **Data Type:** Float
* **Units:** °
* **Column Name:** `shoulder_rotation_plane_tilt`
* **Aggregation:** mean
* **Precision:** 0
* **Measurement:** Trunk tilt for shoulder plane alignment
* **Direction:** Positive indicates tilting forward towards pitcher
* **Typical Range:** -2 – 12 °
* **Optimal Direction:** Middle — moderate values are optimal

## Description

Shoulder rotation plane tilt measures the amount of lateral trunk tilt needed to align with the optimal plane of shoulder rotation, indicating lateral trunk posture for efficient shoulder mechanics.

## 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              | -5 – 11 °                 |  -12 |  -5  |   2  |  11  |  16  |
| High School        | -8 – 6 °                  |  -13 |  -8  |   0  |   6  |  15  |
| College            | 2 – 14 °                  |  -7  |   2  |   7  |  14  |  21  |
| Professional       | 2 – 16 °                  |  -2  |   2  |   8  |  16  |  21  |
| Broad (All Levels) | -2 – 12 °                 |  -11 |  -2  |   4  |  12  |  19  |

## Use Cases

* Lateral trunk posture analysis
* Shoulder mechanics assessment
* Plane alignment evaluation
* Technique optimization