> ## 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.

# Launch Position

> Launch position indicates how the bat is positioned relative to the spine when the swing begins. A proper launch position helps ensure optimal bat path and contact point.

## Technical Details

* **Variable Type:** Discrete Metric
* **Data Type:** Float
* **Units:** Degrees (°)
* **Column Name:** `launch_position`
* **Range:** 0° to 180°
* **Calculation:** Sagittal plane (somersault) angle between bat and spine
* **Measurement Point:** At pelvis velocity initiation (launch event)
* **Aggregation:** mean
* **Precision:** 0
* **Optimal Direction:** Middle — moderate values are optimal

## Interpretation

* **Higher values:** (over 90°) Bat angled downward relative to spine, bat tip is lower
* **Lower values:** (under 90°) Bat angled upward relative to spine, bat tip is higher and bat is closer to being in line with spine.
* **Optimal range:** Typically 30-90° for most hitters, preferrably closer to 90°

## Use Cases

* Swing analysis and coaching
* Bat path optimization
* Pre-swing position consistency