若年野球選手の上肢・下肢の可動域について

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書誌事項

タイトル別名
  • Upper and Lower Extremity Range of Motion in Young Baseball Players
  • 若年野球選手の上肢・下肢の可動域について--障害予防の観点から
  • ジャクネン ヤキュウ センシュ ノ ジョウシ カシ ノ カドウイキ ニ ツイテ ショウガイ ヨボウ ノ カンテン カラ
  • －障害予防の観点から－
  • -From the Standpoint of Injury Prevention-

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抄録

Objective: The purpose of this study was to measure upper and lower extremity range of motion (ROM) of shoulder, forearm, and hip joints to find potential relationships between physical characteristics and injuries in young baseball players.<br>Subjects: Forty-two male youth baseball players visited the orthopedic clinic (age, 13.6±1.9 years; height, 161.1±11.9 cm; weight, 51.5±11.3 kg; BMI, 19.6±2.3; right handers, 40; and left handers, 2). Of those, 31 had a history of shoulder and elbow pain. All subjects were measured for shoulder (internal/external), forearm (pronation/supination) and hip joint (internal/external) ROM.<br>Statistical analysis: The subjects were divided into 3 groups (all subjects, n=42; shoulder and elbow pain group, n=31; and no pain group, n=11). Statistical analysis of ROM was as follows: 1)Shoulder, forearm, and hip joint ROM of all subjects were compared between the left side and right side (paired t test). 2)ROM in the shoulder and elbow pain group and no pain group was compared between the left side and the right side (paired t test). 3)ROM in the shoulder and elbow pain group was compared with that in the no pain group (dependent t test).<br>Results: All subjects, shoulder and elbow pain group, and no pain group had decreased dominant shoulder internal rotation and increased dominant shoulder external rotation compared with the non dominant side but total rotation, forearm rotation and hip joint ROM did not differ significantly between the two sides.<br>Conclusion: Throwing motion repeatedly had changed dominant-side shoulder rotation ROM compared with the non dominant side (decreased internal rotation and increased external rotation range of motion). Further study is needed to investigate particularly whether the change in shoulder rotation ROM was because of throwing, which would be more negative? That is, throwing caused the problem.

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