> ## 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.

# Release Phase Off-Arm to Body Position

> Binary indicator if the ball toss angle is outside the acceptable range at ball release.

## Technical Details

* **Variable Type:** Movement Flag
* **Data Type:** Integer
* **Units:** N/A
* **Column Name:** `release_phase_off_arm_to_body_position`
* **Optimal Direction:** Lower is better
* **Unknown Value:** -1
* **Measurement:** [Loading Phase Ball Release Angle](/biomechanics/activities/tennis/metrics/loading-phase-ball-release-angle) at [Ball Release](/biomechanics/activities/tennis/events/ball-release)
* **Threshold:** Ball toss angle greater than 180° or less than 90°

## Description

Release phase off-arm to body position is a binary indicator that flags when the non-dominant (tossing) arm angle relative to the torso falls outside the acceptable 90°–180° range at ball release, which can indicate an inconsistent or poorly placed ball toss.

## Use Cases

* Toss placement and consistency
* Mechanics evaluation