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# Inter Elbow Distance at Ball Contact

> Distance between the lead and rear elbows at ball contact event. This measures the separation between elbows at the instant of impact.

## Technical Details

* **Variable Type:** Discrete Metric
* **Data Type:** Float
* **Units:** meters (m)
* **Column Name:** `inter_elbow_distance_at_ball_contact`
* **Aggregation:** mean
* **Precision:** 3
* **Optimal Direction:** Middle — moderate values are optimal
* **Measurement:** Distance between lead and rear elbows
* **Timing:** At ball contact event
* **Typical Range:** 0.24-0.38 meters

## Description

Inter elbow distance at ball contact measures the distance between the lead and rear elbows at the moment of ball contact, indicating the arm separation and positioning during impact.

## Normative Ranges

Percentile distributions by competition level from the 2026 Q1 dataset; the optimal range spans the 25th–75th percentiles.

| Population | Optimal Range (25th–75th) | 10th | 25th | 50th | 75th | 90th |
| - | - | :-: | :-: | :-: | :-: | :-: |
| Youth | 0.214 – 0.306 m | 0.193 | 0.214 | 0.249 | 0.306 | 0.355 |
| High School | 0.214 – 0.306 m | 0.193 | 0.214 | 0.249 | 0.306 | 0.355 |
| College | 0.259 – 0.372 m | 0.231 | 0.259 | 0.313 | 0.372 | 0.403 |
| Professional | 0.259 – 0.372 m | 0.231 | 0.259 | 0.313 | 0.372 | 0.403 |
| Broad (All Levels) | 0.231 – 0.344 m | 0.203 | 0.231 | 0.282 | 0.344 | 0.391 |

## Use Cases

* Arm positioning
* Transfer of body's rotational power to bat


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