The relationship between the combined rotational range of motion of the thoracic spine and scapulothoracic joint and elbow joint valgus torque during pitching in high school baseball players

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  • Okamura Shun
    Department of Physical therapy, Health Science Technology, Bunkyo Gakuin University Department of Rehabilitation, General Sagami Kosei Hospital
  • Iida Kai
    Department of Physical therapy, Health Science Technology, Bunkyo Gakuin University
  • Inoue Shota
    Department of Rehabilitation, General Sagami Kosei Hospital
  • Kizugawa Kyohei
    Department of Rehabilitation, General Sagami Kosei Hospital
  • Chiba Masahiro
    Department of Orthopedic Surgery, General Sagami Kosei Hospital

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Other Title
  • 高校野球選手における胸椎および肩甲胸郭関節の複合的な回旋可動域と投球時肘関節外反トルクとの関係性

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Abstract

<p>Objective：This study aimed to examine the relationship between the combined rotational range of motion of the thoracic spine and scapulothoracic joint and the maximum elbow valgus torque during pitching in male high school baseball players.</p><p>Method：The participants included 17 male high school baseball players who belonged to high-ranking schools in the prefectural tournament and had experience as pitchers. The combined range of motion of the thoracic spine rotation and the scapulothoracic joint was measured by the Lumber Locked Rotation test (LLR-t). The maximum elbow valgus torque during pitching was measured by PULSE Throw. The correlation between the angle of the LLR-t to the throwing and non-throwing sides and the elbow valgus torque was subsequently examined.</p><p>Result：A moderately significant negative correlation (r＝－0.49, p＝0.04) was observed between the LLR-t to the throwing side and maximum elbow valgus torque.</p><p>Conclusion：Evaluating the combined range of motion of the thoracic spine and the scapulothoracic joint, rather than the rotation of the thoracic spine alone, is beneficial for baseball elbow cases and injury prevention in high school baseball players.</p>

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