> ## 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.

# Landing Stiffness Index

> Index of landing stiffness during the landing phase.

## Technical Details

* **Variable Type:** Discrete Metric
* **Data Type:** Float
* **Units:** N/A (index)
* **Column Name:** (varies by implementation)
* **Aggregation:** mean
* **Precision:** 2
* **Optimal Direction:** Middle — moderate values are optimal
* **Measurement:** Stiffness or compliance of the lower extremity during landing absorption

## Description

Landing stiffness index quantifies how stiff or compliant the athlete's landing is.
Higher stiffness may indicate a stiffer, less shock-absorbing strategy; lower stiffness (more compliance) typically reflects greater absorption through joint motion.

May be reported with a companion classification (e.g., landing stiffness index level).

## Use Cases

* Landing strategy and injury risk
* Impact absorption assessment
* Screening and intervention feedback