> ## 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 (Foot Contact)

> Lateral (left-right) trunk tilt at foot contact. 

## Technical Details

* **Variable Type:** Discrete Metric
* **Data Type:** Float
* **Units:** °
* **Column Name:** `trunk_lateral_tilt_at_foot_contact`
* **Aggregation:** mean
* **Precision:** 0
* **Measurement:** Frontal plane trunk angle relative to the global coordinate system
* **Timing:** At foot contact event
* **Typical Range:** -7 – 3 °
* **Optimal Direction:** Middle — moderate values are optimal

## Description

Trunk lateral tilt at foot contact measures the side-to-side (left/right) tilt of the trunk at the instant of front foot contact 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              | -8 – -2 °                 |  -11 |  -8  |  -5  |  -2  |   1  |
| High School        | -7 – 0 °                  |  -10 |  -7  |  -3  |   0  |   8  |
| College            | -4 – 4 °                  |  -8  |  -4  |   1  |   4  |   8  |
| Professional       | -4 – 11 °                 |  -10 |  -4  |   5  |  11  |  16  |
| Broad (All Levels) | -7 – 3 °                  |  -10 |  -7  |  -3  |   3  |   9  |

## Use Cases

* Trunk alignment assessment at foot contact
* Posture evaluation