> ## 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.

# Cocking Phase Max X Factor

> Maximum hip-shoulder separation (X-Factor) reached during the cocking phase of the serve.

## Technical Details

* **Variable Type:** Discrete Metric
* **Data Type:** Float
* **Units:** degrees (°)
* **Column Name:** `cocking_phase_max_x_factor`
* **Measurement:** Maximum transverse-plane angle between the shoulders and hips during the cocking phase

## Description

Cocking phase max X-Factor measures the largest hip-shoulder separation reached while the arm is cocking back before acceleration, reflecting how much torso coil the server builds before driving into the ball. Higher values generally indicate greater potential for power transfer.

## Use Cases

* Power generation assessment
* Cocking phase mechanics
* Comparison with Contact Phase X Factor