> ## 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.

# Twist

> The average timing of segment angular velocities.

## Technical Details

* **Variable Type:** Event
* **Data Type:** Integer
* **Units:** Frame number
* **Column Name:** `twist_frame`
* **Required for QA:** True
* **Measurement:** Average of the maximum rotation velocity time for the pelvis, trunk, and arm

## Description

Twist marks the average timing of peak segment angular velocities (pelvis, trunk, and arm) during the pitching motion.
This is a broad representation of the pitch, used to help determine if a pitch was recorded.

## Use Cases

* Pitch detection