> ## 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 Forearm Forward Angular Velocity

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

## Technical Details

* **Variable Type:** Discrete Metric
* **Data Type:** Float
* **Units:** degrees/second (°/s)
* **Column Name:** `peak_forearm_forward_angular_velocity`
* **Measurement:** Peak forward (serve-direction) angular velocity of the forearm segment, typically near [Apex](/biomechanics/activities/tennis/events/apex)

## Description

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

## Use Cases

* Kinematic sequence and energy transfer
* Technique quality (optimal sequence)
* Racket speed proxy and comparison with torso/upper arm