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Relationship between chronic heat stress protocols and skeletal muscle adaptation

Research Project

Project/Area Number 20K23270
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 InstitutionNiigata University of Health and Welfare (2021-2022)
Health Science University (2020)

Principal Investigator

Ryo Ikegami  新潟医療福祉大学, リハビリテーション学部, 助教 (70881770)

Project Period (FY) 2020-09-11 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords温熱療法 / 筋肥大 / 筋萎縮 / 温度感受性チャネル / TRPV1
Outline of Research at the Start

近年,温熱療法は筋肥大を引き起こす可能性が示されており,積極的な運動が困難な患者への応用が期待されている.しかしながら,温熱療法による筋肥大を裏付けるエビデンスは十分でなく,そのメカニズムの詳細も不明である.本研究では温度感受性チャネルであるTRPV1に焦点を当て,温熱刺激による筋肥大に対するTRPV1の新たな機能的意義を解明することにより,運動トレーニングに変わる新規筋肥大方法の開発を目指す.

Outline of Final Research Achievements

This study investigated the effects of thermal stimulation on muscle hypertrophy in slow-twitch and fast-twitch muscles. Therefore, we measured the intracellular calcium ion concentration and the activity of the muscle hypertrophy signaling pathway in fast-twitch muscle, which exhibits lower buffering capacity compared to slow-twitch muscle with higher buffering capacity, following thermal stimulation. The findings indicate a higher prevalence of temperature-sensitive channels in slow muscles compared to fast muscles. Furthermore, the activity of the hypertrophic signal was observed to be higher in fast muscles following the application of thermal stimulation. These findings underscore the potential efficacy of thermal stimulation as a valuable tool for promoting muscle hypertrophy in clinical practice. Consequently, careful consideration should be given to muscle selection when utilizing thermal stimulation for clinical applications in muscle hypertrophy.

Academic Significance and Societal Importance of the Research Achievements

本研究の最終的な目標は,温熱刺激による筋肥大メカニズムを解明し,運動トレーニングに変わる新たな筋肥大方法として臨床応用への発展を目指すことである.近年,温熱刺激はタンパク合成経路を活性化させることが示されている.しかしながら,そのメカニズムは未解明であり,臨床現場において筋肥大目的に温熱療法を適応し成功した例は無い.本研究は筋繊維タイプにより温熱刺激に対する筋肥大の効果が異なることを示唆しており,今後温熱刺激による筋肥大を臨床応用する上で有用なプロトコルの立案への貢献が期待される.

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (4 results)

All 2022 2021 2020

All Journal Article (2 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 2 results,  Open Access: 2 results) Presentation (2 results)

  • [Journal Article] The Effect of Single Bout Treatment of Heat or Cold Intervention on Delayed Onset Muscle Soreness Induced by Eccentric Contraction2022

    • Author(s)
      Yoshida Riku、Nakamura Masatoshi、Ikegami Ryo
    • Journal Title

      Healthcare

      Volume: 10 Issue: 12 Pages: 2556-2556

    • DOI

      10.3390/healthcare10122556

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Type I diabetes suppresses intracellular calcium ion increase normally evoked by heat stress in rat skeletal muscle2021

    • Author(s)
      Ikegami Ryo、Eshima Hiroaki、Nakajima Toshiaki、Toyoda Shigeru、Poole David C.、Kano Yutaka
    • Journal Title

      American Journal of Physiology-Regulatory, Integrative and Comparative Physiology

      Volume: 320 Issue: 4 Pages: R384-R392

    • DOI

      10.1152/ajpregu.00168.2020

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] 慢性的な温熱刺激プロトコールと骨格筋適応の関係性2022

    • Author(s)
      池上諒
    • Organizer
      日本体力医学会
    • Related Report
      2022 Annual Research Report
  • [Presentation] I型糖尿病は熱刺激による細胞内カルシウムイオン増加を抑制する2020

    • Author(s)
      池上諒,狩野豊
    • Organizer
      第25回日本基礎理学療法学会
    • Related Report
      2020 Research-status Report

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Published: 2020-09-29   Modified: 2024-01-30  

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