> ## 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 Torso Forward Angular Velocity

> Peak forward angular velocity of the torso segment in the serve direction.

## Technical Details

* **Variable Type:** Discrete Metric
* **Data Type:** Float
* **Units:** degrees/second (°/s)
* **Column Name:** `peak_torso_forward_angular_velocity`
* **Measurement:** Peak forward (somersault) angular velocity of the torso segment in teh serve direction

## Description

Peak torso forward angular velocity is the maximum angular velocity of the torso in the serve direction.
It is the first segment in the optimal [Kinematic Sequence](/biomechanics/activities/tennis/metrics/forward-kinematic-sequence) (torso → upper arm → forearm), reflecting proximal-to-distal energy transfer.

## Use Cases

* Kinematic sequence and energy transfer
* Technique quality (optimal sequence)
* Comparison with peak upper arm and forearm velocities