> ## 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.

# Loading Phase Excessive Knee Valgus

> If knee valgus exceeds the acceptable threshold on either leg during the loading phase.

## Technical Details

* **Variable Type:** Movement Flag
* **Data Type:** Integer
* **Units:** N/A
* **Column Name:** `loading_phase_excessive_knee_valgus`
* **Optimal Direction:** Lower is better
* **Unknown Value:** -1
* **Measurement:** Front and back knee valgus classification level during the loading phase
* **Threshold:** Front or back knee valgus classified as "high"

## Description

Loading phase excessive knee valgus is a binary indicator that flags when either the front or back knee is classified as having a "high" level of inward (valgus) collapse during the loading phase, which is a common indicator of increased lower-body injury risk.

High knee valgus occurs when the knee moves medially (inwards towards the centerline of the body) more than 6% of height.
Moderate knee valgus occurs when the knee moves medially more than 2% of body height.
Normalized distances (% of height) aid in metric consistency across athletes of various sizes.

## Use Cases

* Injury risk identification
* Lower-body mechanics evaluation