> ## 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


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