Table 2.
Preseason Versus Postseason Changes in Pitching Kinematic and Dynamic Ultrasound Measurements
| Preseason | Postseason | P Value | |
|---|---|---|---|
| Ball velocity, mph | 75.8 ± 0.4 | 77.1 ± 0.4 | .041 |
| Arm slot, ° | 45.7 ± 1.6 | 43.0 ± 1.6 | .256 |
| Arm speed, rpm | 888.2 ± 8.4 | 892.2 ± 8.4 | .744 |
| Arm rotation, ° | 149.5 ± 1.5 | 152.4 ± 1.5 | .199 |
| Elbow torque, Nm | 46.1 ± 0.9 | 45.7 ± 0.9 | .72 |
| UCL thickness, mm | 1.56 ± 0.09 | 1.92 ± 0.09 | .001 |
| Unloaded UHJS, mm | 2.94 ± 0.10 | 2.85 ± 0.10 | .364 |
| Loaded UHJS | 4.09 ± 0.20 | 4.61 ± 0.21 | .063 |
| UHJS delta | 1.15 ± 0.22 | 1.77 ± 0.23 | .028 |
NOTE. Continuous variables are presented using mean ± standard deviation, and categorical variables are presented as number (percentage). Statistically significant P values are indicated in bold (P < .05).
mph, miles per hour; rpm, rotations per minute; UCL, ulnar collateral ligament; UHJS, ulnohumeral joint space.