> ## 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.

# Elbow Flexion at Ball Contact

> Amount of rear elbow flexion at ball contact event. This measures the elbow angle at the instant of impact.

## Technical Details

* **Variable Type:** Discrete Metric
* **Data Type:** Float
* **Units:** °
* **Column Name:** `rear_elbow_flexion_at_ball_contact`
* **Aggregation:** mean
* **Precision:** 0
* **Measurement:** Rear elbow flexion angle
* **Timing:** At ball contact event
* **Typical Range:** 60 – 90 °
* **Optimal Direction:** Middle — moderate values are optimal

## Description

Elbow flexion at ball contact measures the amount of rear elbow flexion at the moment of ball contact, indicating the arm position and extension 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 | 70 – 90 ° | 62 | 70 | 82 | 90 | 101 |
| High School | 69 – 93 ° | 50 | 69 | 81 | 93 | 108 |
| College | 48 – 86 ° | 35 | 48 | 70 | 86 | 104 |
| Professional | 42 – 74 ° | 31 | 42 | 60 | 74 | 97 |
| Broad (All Levels) | 60 – 90 ° | 37 | 60 | 75 | 90 | 101 |

## Use Cases

* Impact position analysis
* Rear elbow mechanics assessment
* Contact evaluation