野球オーバーハンド投球における上肢・上肢帯筋活動の表面筋電図分析

• 斎藤 健治

  佐賀大学理工学部都市工学科

• 松尾 知之

  大阪大学大学院医学系研究科

• 宮崎 光次

  桜美林大学文学部健康心理学科

書誌事項

タイトル別名

• Analysis of surface electromyogram of muscle activity in the upper limb and shoulder girdle during overhand baseball pitching

抄録

In order to investigate muscle activity during overhand baseball pitching, surface EMG analysis of muscles in the shoulder girdle and upper limb was performed. The subjects were two college baseball players. Surface EMG was recorded from 25 portions of 16 muscles: the long and short head of the biceps brachii, the coracobrachialis, the brachialis, the lateral, medial and long head of the triceps brachii, the anterior, middle and posterior deltoid, the sternocostalis of the pectoralis major, the latissimus dorsi, the upper, middle and lower trapezius, three portions of the serratus anterior, the pronator teres, the flexor carpi radialis, the flexor carpi ulnalis, the extensor carpi radialis, the extensor digitorum, the extensor carpi ulnalis, and the brachioradialis. After rectifying the surface EMGs, their linear envelopes were extracted with a digital low-pass filter. The duration, timing and similarity of these muscle activities before and after ball-release were analyzed quantitatively through auto-correlation and cross-correlation analysis of the envelopes. The biceps and the brachialis were activated in the cocking phase and follow-through phase, and played a role in preparing for acceleration and deceleration in each phase. The triceps was activated in the acceleration phase and elbow joint extension, and contributed to the increase of ball speed by minimizing the moment of inertia about the longitudinal axis of the upper limb. The coracobrachialis was activated from the cocking phase until ball-release, and contributed to the horizontal extension of the shoulder joint. The latissimus dorsi and the pectoralis major were activated in the acceleration phase, and the duration of their activity was shorter than that of the other muscles. The activities of the trapezius and the serratus anterior differed between the two subjects. These activities in one subject were simultaneous in the acceleration phase, and those in the other were separate in the cocking phase. These activities probably represent differences in the control of scapula motion during pitching. The peak activities of the forearm muscles were concentrated in the ball-release phase, and the duration of activity was longer in the extensor muscles than in the flexor muscles. This type of correlation analysis is useful for extracting information about muscle activity during baseball pitching.

収録刊行物

• 体育学研究

  体育学研究 51 (3), 351-365, 2006

  一般社団法人 日本体育・スポーツ・健康学会

キーワード

• 多チャンネル表面筋電図
• 筋活動パターン
• 自己相関関数
• 相互相関関数

詳細情報

• CRID: 1390001204100775680
• NII論文ID: 130004489521
• DOI: 10.5432/jjpehss.51.351
• ISSN: 18817718
• ISSN: 04846710
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• 抄録ライセンスフラグ: 使用不可