> ## 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.

# Hip Knee Dominance

> Ratio of hip vs. knee contribution (0 = hip dominant, 1 = knee dominant) during a given phase.

## Technical Details

* **Variable Type:** Discrete Metric
* **Data Type:** Float
* **Units:** ratio (0–1)
* **Column Name:** Varies by phase and jump type (see Events/Phases)
* **Aggregation:** mean
* **Precision:** 2
* **Optimal Direction:** Middle — moderate values are optimal
* **Measurement:** Relative contribution of hip vs. knee motion during the specified phase

## Events / Phases

This metric can be reported at different events or phases depending on jump type:

* **Eccentric (jumping):** From [Initiation](/biomechanics/activities/jump/events/initiation) to [Bottom](/biomechanics/activities/jump/events/bottom).
  * Column examples:
    * `eccentric_hip_knee_dominance` (bilateral);
    * `right_eccentric_hip_knee_dominance`, `left_eccentric_hip_knee_dominance` (single-leg).
* **Concentric (jumping):** From [Bottom](/biomechanics/activities/jump/events/bottom) to [Takeoff](/biomechanics/activities/jump/events/takeoff).
  * Column examples:
    * `concentric_hip_knee_dominance` (bilateral);
    * `right_concentric_hip_knee_dominance`, `left_concentric_hip_knee_dominance` (single-leg).
* **Landing:** From [Landing](/biomechanics/activities/jump/events/landing) to [Termination](/biomechanics/activities/jump/events/termination).
  * Column example:
    * `landing_hip_knee_dominance`

## Description

Hip knee dominance describes how much the athlete uses the hip versus the knee during a given phase.
A value of 0 indicates hip-dominant strategy; 1 indicates knee-dominant.

Single-leg jump types may report left/right-specific columns for eccentric and concentric phases; landing is often a single value.
The phase (eccentric, concentric, or landing) determines which column name applies.

## Use Cases

* Movement strategy and injury risk (e.g., knee-dominant loading)
* Coaching and technique feedback
* Bilateral or single-leg comparison across phases