Technical Details
- Variable Type: Discrete Metric
- Data Type: Float
- Units: raw: m, display: in
- Column Name:
rear_arm_connection - Aggregation: mean
- Precision: 1
- Measurement: Average distance from rear elbow to mid-torso
- Timing: Launch to ball contact events
- Typical Range: 8.9 – 15.7 in
- Optimal Direction: Middle — moderate values are optimal
Description
Rear arm connection measures the average distance between the rear elbow and the mid-torso during the swing. This metric indicates the relative connection and efficiency of the rear arm position to the torso during the acceleration phase. Maintaining a tight connection between rear arm and torso improves power transfer.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 | 7.2 – 9.6 in | 6.3 | 7.2 | 8.4 | 9.6 | 11.6 |
| High School | 8.9 – 11.7 in | 7.6 | 8.9 | 9.9 | 11.7 | 15.0 |
| College | 12.2 – 17.1 in | 10.2 | 12.2 | 14.3 | 17.1 | 18.9 |
| Professional | 14.7 – 18.5 in | 13.0 | 14.7 | 16.3 | 18.5 | 20.6 |
| Broad (All Levels) | 8.9 – 15.7 in | 7.2 | 8.9 | 11.7 | 15.7 | 18.7 |
Use Cases
- Arm connection analysis
- Swing efficiency assessment
- Power transfer evaluation