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Coordination of muscle activity for the prevention of disability

Research Project

Project/Area Number 21K21259
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeMulti-year Fund
Review Section 0909:Sports sciences, physical education, health sciences, and related fields
Research InstitutionJapan University of Health Sciences

Principal Investigator

Ishii Tomoya  日本保健医療大学, 保健医療学部理学療法学科, 助手 (00910043)

Project Period (FY) 2021-08-30 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2022: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords筋収縮後増強 / 筋活動増強 / 障害予防 / ウォーミングアップ / リハビリテーション / 運動制御 / 活動後増強
Outline of Research at the Start

骨格筋は関節を支持し,協調して働くことでヒトの円滑な身体運動を可能にしている.骨格筋の協調的な筋活動のバランスが崩れることは,一部の筋,関節への負担が高まる原因となり,日常生活動作の障害,QOLの低下へとつながる可能性がある.本研究では,短時間の事前活動による筋活動の変化に着目し,骨格筋の筋活動をコントロールする方法を明らかにする.骨格筋の協調的な筋活動の獲得は,加齢による変形性疾患から子どものスポーツ障害の予防に向けた新たなウォーミングアップ,リハビリテーションの開発へと発展する可能性がある.

Outline of Final Research Achievements

This study focused on changes in muscle activity due to brief pre-activation (conditioning contraction). We aimed to identify strategies to control the amount of electromyography (EMG) activity required to reduce strain on muscles and joints. In the isometric elbow flexion task, following conditioning contractions, EMG activity either increased or decreased in the biceps brachii muscle, but decreased in the brachioradialis and triceps brachii muscles. Conversely, in the isometric elbow extension task, no change in EMG activity was observed in the biceps, brachioradialis, or triceps muscles after conditioning contractions. These findings suggest that neuromodulation of muscle activity following conditioning contractions may vary depending on the specific muscle involved.

Academic Significance and Societal Importance of the Research Achievements

本研究の成果より、短時間の随意収縮後、収縮強度の違いにより、筋活動量が増大もしくは減少することが明らかになった。また、随意収縮後における筋活動量の変化は、筋によってその反応が異なることが明らかになった。これら知見は、筋や関節への負担軽減のための適切な筋活動量の調整とともに、障害予防に向けた新たなリハビリテーションやウォーミングアップにつながる可能性がある。

Report

(3 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • Research Products

    (4 results)

All 2023 2022 2021

All Journal Article (3 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 3 results,  Open Access: 1 results) Presentation (1 results)

  • [Journal Article] Post-contraction potentiation can react inversely to post-activation potentiation depending on the test contraction force2023

    • Author(s)
      Ishii Tomoya、Sasada Syusaku、Komiyama Tomoyoshi
    • Journal Title

      Neuroscience Letters

      Volume: 801 Pages: 137132-137132

    • DOI

      10.1016/j.neulet.2023.137132

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Possible neural mechanisms underlying post-contraction potentiation in elbow flexor muscle in humans2021

    • Author(s)
      Tomoya Ishii , Syusaku Sasada , Tomoyoshi Komiyama
    • Journal Title

      The Journal of Physical Fitness and Sports Medicine

      Volume: 10 Issue: 4 Pages: 171-179

    • DOI

      10.7600/jpfsm.10.171

    • NAID

      130008065265

    • ISSN
      2186-8123, 2186-8131
    • Year and Date
      2021-07-25
    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Transcranial direct current stimulation of primary motor cortex modulates post-contraction potentiation2021

    • Author(s)
      Tomoya Ishii, Syusaku Sasada, Shinya Suzuki, Tomoyoshi Komiyama
    • Journal Title

      The Journal of Physical Fitness and Sports Medicine

      Volume: 10 Issue: 1 Pages: 13-23

    • DOI

      10.7600/jpfsm.10.13

    • NAID

      130007967772

    • ISSN
      2186-8123, 2186-8131
    • Year and Date
      2021-01-25
    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 筋収縮後増強発生時における肘関節周囲筋の動態2022

    • Author(s)
      石井智也 , 笹田周作 , 小宮山伴与志
    • Organizer
      第27回日本基礎理学療法学会学術大会
    • Related Report
      2022 Annual Research Report

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Published: 2021-10-22   Modified: 2024-01-30  

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