> ## 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.

# Max X Factor

> Max amount of twist hip shoulder separation during the swing.

## Technical Details

* **Variable Type:** Discrete Metric
* **Data Type:** Float
* **Units:** °
* **Column Name:** `max_x_factor`
* **Aggregation:** mean
* **Precision:** 0
* **Measurement:** maximum twist angle difference between shoulders and hips (torso and pelvis)
* **Optimal Direction:** Middle — moderate values are optimal

## Description

Max amount of hip shoulder separation (X Factor) during the swing.
Usually occurs as the pelvis begins its rotation, while the torso is relatively stable.
Greater amounts of X Factor may permit greater range of motion through which to rotate for the swing.

## 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              | 25 – 38 °                 |  14  |  25  |  30  |  38  |  43  |
| High School        | 22 – 35 °                 |   9  |  22  |  30  |  35  |  42  |
| College            | 19 – 29 °                 |  14  |  19  |  25  |  29  |  35  |
| Professional       | 12 – 23 °                 |   8  |  12  |  16  |  23  |  28  |
| Broad (All Levels) | 17 – 33 °                 |   9  |  17  |  26  |  33  |  40  |

## Use Cases

* Pre-swing loading
* Range of motion assessment

## Interventions

* [Separation Drill](https://www.youtube.com/watch?v=EczxevOOVLY)
  * Focus Area: Limited Separation
* [Hook'Em Drill](https://youtu.be/IyCE0hey7-I)
  * Focus Area: Back Hip Loading, Limited Separation