> ## 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.

# Peak Pelvis Twist Angular Velocity

> Peak twist angular velocity of the pelvis segment in the serve direction.

## Technical Details

* **Variable Type:** Discrete Metric
* **Data Type:** Float
* **Units:** degrees/second (°/s)
* **Column Name:** `pelvis_peak_twist_angular_velocity`
* **Measurement:** Peak twist (transverse plane, like a tornado) angular velocity of the pelvis

## Description

Peak pelvis twist angular velocity is the maximum twisting angular velocity of the pelvis in the transverse plane (like a tornado).
It is the most proximal segment in the [Twist Kinematic Sequence](/biomechanics/activities/tennis/metrics/twist-kinematic-sequence) (pelvis-torso-upper\_arm), reflecting lower-body contribution to the kinetic chain.

## Use Cases

* Twist kinematic sequence and energy transfer
* Lower-body contribution to serve
* Comparison with peak torso and upper arm twist velocities