Functional differences in scapular upward rotation on the thorax among different generations of baseball players with throwing injuries

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  • Aso T
    Department of Rehabilitation, Showa University Fujigaoka Rehabilitation Hospital Doctoral Program, Showa University Graduate School of Health Sciences
  • Tamura M
    Department of Rehabilitation, Showa University Fujigaoka Rehabilitation Hospital Showa University Research Institute for Sport and Exercise Sciences
  • Noguchi Y
    Department of Rehabilitation, Showa University Fujigaoka Rehabilitation Hospital Department of Physical Therapy, Showa University School of Nursing and Rehabilitation Sciences
  • Furuya K
    Showa University Research Institute for Sport and Exercise Sciences Department of Orthopaedic Surgery, Showa University Fujigaoka Hospital
  • Nishinaka N
    Showa University Research Institute for Sport and Exercise Sciences Department of Orthopaedic Surgery, Showa University Fujigaoka Hospital Showa University Graduate School of Health Sciences

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Other Title
  • 投球障害例の世代間における胸郭および肩甲骨上方回旋機能差の検討
  • トウキュウ ショウガイレイ ノ セダイ カン ニ オケル キョウカク オヨビ ケンコウコツ ジョウホウ カイセン キノウサ ノ ケントウ

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Abstract

<p>This study was intended to investigate functional differences in scapular upward rotation on the thorax among different generations of baseball players with throwing injuries. Forty-two baseball players with throwing injuries and 10 healthy baseball players, who served as controls, were included. The scapular upward rotation movements on the thorax were calculated using the frontal radiography images of the upper extremity in the down and elevated positions. Patients with throwing injuries were classified into two groups: those aged < 15 years (U15 group) and those aged > 16 years (O16 group). Each measured parameter was compared between the U15, O16, and control groups. The upper thorax showed less movement in the O16 and U15 groups than the control group, and less in the former than the latter. Thorax function decreased in cases of throwing injury of high school students and older individuals, suggesting that this may be a physical function that may increase the load on the shoulder and elbow during pitching.</p>

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