> ## 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.

# Sway

> Binary indicator of a sway fault — the pelvis shifts laterally away from the target by more than 10 cm between Address and Impact instead of rotating in place.

## Technical Details

* **Variable Type:** Movement Flag
* **Data Type:** Integer
* **Units:** N/A
* **Column Name:** `sway`
* **Optimal Direction:** Lower is better
* **Unknown Value:** -1
* **Measurement:** Mid-pelvis X position, between P1 Address and P7 Impact
* **Threshold:** Pelvis X position drops more than 10 cm (0.1 m) below its Address value at any point

## Description

Sway flags a golfer whose pelvis shifts laterally away from the target during the backswing rather than rotating around a stable base. The magnitude of the lateral shift is reported separately by the [Pelvis Sway Range](/biomechanics/activities/golf/swing/metrics/pelvis-sway-range) metric.

## Use Cases

* Lower body stability analysis
* Swing consistency coaching