> ## 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.

# Lunge Depth

> Vertical displacement of the pelvis during the forward lunge, reflecting range of motion depth.

## Technical Details

* **Variable Type:** Discrete Metric
* **Data Type:** Float
* **Units:** meters (m)
* **Column Name:** `lunge_forward_lunge_depth`
* **Aggregation:** mean
* **Precision:** 2
* **Optimal Direction:** Higher is better
* **Measurement:** Difference between the average pelvis height outside the lunge (before [Initiation](/biomechanics/activities/lunge/events/initiation) and after [End](/biomechanics/activities/lunge/events/end)) and the minimum pelvis height during the lunge

## Description

Lunge depth is the vertical drop of the pelvis from the standing baseline to the lowest position during the forward lunge.
A greater depth indicates a deeper, more demanding lunge.
The baseline is computed as the average pelvis height in frames outside the lunge window (before and after the lunge) to account for subject height variation.

## Use Cases

* Range of motion assessment
* Movement quality and consistency
* Comparison across athletes or over time