> ## 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 Shoulder Hyperangulation

> Maximum shoulder horizontal abduction during the cocking phase of the serve.

<img src="https://mintcdn.com/upliftlabs/Ku7T6jLWrJyoK7uq/biomechanics/activities/tennis/images/shoulder-hyperangulation.png?fit=max&auto=format&n=Ku7T6jLWrJyoK7uq&q=85&s=7b0634d57e49332ca67b714db4e28231" alt="Shoulder hyperangulation during cocking" width="500" height="500" data-path="biomechanics/activities/tennis/images/shoulder-hyperangulation.png" />

## Technical Details

* **Variable Type:** Discrete Metric
* **Data Type:** Float
* **Units:** degrees (°)
* **Column Name:** `cocking_phase_shoulder_hyperangulation`
* **Measurement:** Maximum horizontal abduction (hyperangulation) of the shoulder during the cocking phase ([Low Arm](/biomechanics/activities/tennis/events/low-arm) to [Max Shoulder ER](/biomechanics/activities/tennis/events/max-shoulder-er))

## Description

Shoulder hyperangulation is the maximum horizontal abduction of the dominant shoulder during the cocking phase—the "elbow back" position.
It can be used alongside external rotation for technique and load assessment.

## Use Cases

* Shoulder position and technique
* Injury risk and load assessment