> ## 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.

# P1 Address

> Static setup position immediately before the swing begins, identified as roughly 0.3 seconds before the hands start rising toward the top of the backswing.

## Technical Details

* **Variable Type:** Event
* **Data Type:** Integer
* **Units:** Frame number
* **Column Name:** `p1_address_frame`
* **Required for QA:** False
* **Measurement:** 0.3 s before the onset of the hands rising toward the Low Hands / Top of Swing peak
* **Timing:** First event in the P Classification System, before P2 Takeaway

## Description

P1 Address marks the golfer's setup position before any swing motion begins. It is located by working backward 0.3 seconds from the point where the hands start to rise toward the top of the backswing, capturing the static stance and grip position used as the reference posture for angle-at-event metrics.

## Use Cases

* Swing timing analysis
* Setup and posture assessment
* Reference posture for angle-at-event metrics