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
- Focus Area: Limited Separation
- Hook’Em Drill
- Focus Area: Back Hip Loading, Limited Separation