Contralateral Trunk Tilt in High School Baseball Pitchers: Comparison and Relationship with Trunk Rotational Mobility, Compensatory Lateral Flexion, and Performance
Hiromu Tanaka, Yoshinori Kagaya · 2026
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Description
Tanaka and Kagaya study contralateral trunk tilt, the sideways lean away from the throwing arm, in high school baseball pitchers. A big lean loads the shoulder and elbow, and coaches often blame stiff trunk rotation. Their 2026 study tests 19 male pitchers aged 15 to 18. A thirty degree cutoff splits them into high tilt and low tilt groups. The team measures rotation range with tilt gauges in two locked positions, plus sideways bending during rotation.
The high tilt group, nine boys, rotated no less than the low tilt group on either side. Both groups bent sideways alike during rotation. Stiffness does not explain the lean here. Tilt at the moment of peak shoulder rotation did track ball speed moderately, and ball speed tracked elbow stress strongly. Chasing velocity, the authors imply, may drive the risky lean more than any lack of trunk mobility does.
Catalog record
| CREATOR | Hiromu Tanaka, Yoshinori Kagaya |
|---|---|
| YEAR | 2026 |
| COLLECTION | PAPERS |
| FORMAT | TXT |
| FILE SIZE | 33 KB |
| LICENSE | https://creativecommons.org/licenses/by/4.0 |
| RIGHTS | CC BY |
| SOURCE | Europe PMC |