> ## 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.

# P5 Transition

> The change of direction from backswing to downswing, identified from the trailing edge of the hand-height peak near the top of the swing.

## Technical Details

* **Variable Type:** Event
* **Data Type:** Integer
* **Units:** Frame number
* **Column Name:** `p5_transition_frame`
* **Required for QA:** False
* **Measurement:** Trailing-edge width boundary of the hand-height peak located between Address and Low Hands
* **Timing:** Between P4 Top of Swing and P6 Pre-Impact

## Description

P5 Transition marks the moment the swing changes direction from backswing to downswing. It is identified from the trailing edge of the hand-height peak found between Address and Low Hands.

## Use Cases

* Transition timing
* Reverse Spine Angle detection window boundary