> ## 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.

# Global Trunk Rotation at P4 Top of Swing

> Trunk rotation angle relative to its own position at Address, measured in the global reference frame, at P4 Top of Swing.

## Technical Details

* **Variable Type:** Discrete Metric
* **Data Type:** Float
* **Units:** deg
* **Column Name:** `global_trunk_rotation_at_p4`
* **Aggregation:** mean
* **Precision:** 0
* **Optimal Direction:** N/A
* **Measurement:** Trunk rotation angle in the global reference frame, sampled at the P4 Top of Swing event

## Description

Global Trunk Rotation at P4 Top of Swing reports the trunk rotation angle relative to its own position at Address, measured in the global reference frame, sampled at the P4 Top of Swing event. Global angles are expressed relative to the ground/vertical reference frame rather than a body-relative axis, making them comparable across different camera setups.

## Use Cases

* Global posture assessment
* P4 Top of Swing position analysis