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Changes in morphological and mechanical properties of muscle-tendon unit with aging

Research Project

Project/Area Number 20509007
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Sports science
Research InstitutionWaseda University

Principal Investigator

KINUGASA Ryuta  Waseda University, スポーツ科学学術院, 助教 (10409378)

Project Period (FY) 2008 – 2010
Project Status Completed (Fiscal Year 2010)
Budget Amount *help
¥3,640,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥240,000)
Fiscal Year 2010: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2009: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2008: ¥2,600,000 (Direct Cost: ¥2,600,000)
Keywords歪み / 高齢者 / 腓腹筋 / 腱膜 / ギア比 / 筋束 / 足関節底屈 / 筋・腱組織のひずみ / 筋の形状 / 腱組織の形状 / 筋収縮 / ヒラメ筋
Research Abstract

I hypothesized that during an isometric contraction, elderly people have greater longitudinal strain than young people. Aponeurosis longitudinal strain was greater in young people than in elderly people. The magnitude of fascicle shortening was significantly lower in elderly people than in young people. The "amplification" of muscle fascicle length changes into aponeurosis displacement has been termed the "gear ratio". The lower than unity value of the ratio implies that the aponeurosis displacement is lower than the fascicle length change. These results suggest that movement of the calcaneus would be constrained by due to lower aponeurosis longitudinal strain without amplification of the muscle fascicle length change.

Report

(4 results)
  • 2010 Annual Research Report   Final Research Report ( PDF )
  • 2009 Annual Research Report
  • 2008 Annual Research Report
  • Research Products

    (12 results)

All 2010 2008 Other

All Journal Article (3 results) (of which Peer Reviewed: 3 results) Presentation (4 results) Book (2 results) Remarks (3 results)

  • [Journal Article] Reduction in Tendon Elasticity from Unloading is unrelated to its Hypertrophy.2010

    • Author(s)
      Ryuta Kinugasa, John A.Hodgson, V.Reggie Edgerton, David D.Shin, Shantanu Sinha
    • Journal Title

      J Appl Physiol 109

      Pages: 870-877

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] Reduction in tendon elasticity from unloading is unrelated to its hypertrophy2010

    • Author(s)
      Kinugasa, et al
    • Journal Title

      J Appl Physiol

      Volume: 109 Pages: 870-877

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Phase contrast MRI reveals the mechanical behavior of the superficial and deep aponeuroses in human medial gastrocnemius during isometric contraction2008

    • Author(s)
      Ryuta Kinugasa, Dongsuk Shin, Junichiro Yamauchi, Chandan Mishra, John A.Hodgson, V.Reggie Edgerton, Shantanu Sinha
    • Journal Title

      J Appl Physiol 105

      Pages: 1312-1320

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Presentation] Reduced Stiffness is Uncorrelated to Tendon Hypertrophy Resulting From Unloading of LowerLeg Limb.2010

    • Author(s)
      Ryuta Kinugasa, John A. Hodgson, V.Reggie Edgerton, David D.Shin, Shantanu Sinha
    • Organizer
      15th annual Congress of the European College of Sport Science
    • Place of Presentation
      Antalya, Turkey
    • Related Report
      2010 Final Research Report
  • [Presentation] Reduced Stiffness is Uncorrelated to Tendon Hypertrophy Resulting From Unloading of LowerLeg Limb2010

    • Author(s)
      Kinugasa, et al.
    • Organizer
      15th annual Congress of the European College of Sport Science
    • Place of Presentation
      Antalya, Turkey
    • Related Report
      2010 Annual Research Report
  • [Presentation] Velocity encoded phase contrast MRI reveals in vivo tissue dynamics of the human medial gastrocnemius during isometric contraction.2008

    • Author(s)
      Ryuta Kinugasa, Dongsuk Shin, John A.Hodgson, V.Reggie Edgerton, Shantanu Sinha
    • Organizer
      International Society for Magnetic Resonance in Medicine 16th Scientific Meeting and Exhibition
    • Place of Presentation
      Toronto, Canada
    • Related Report
      2010 Final Research Report
  • [Presentation] Superficial and deep aponeuroses movements in the human medial gastrocnemius during isometric plantarflexion contraction2008

    • Author(s)
      Ryuta Kinugasa, Dongsuk Shin, John A.Hodgson, V.Reggie Edgerton, Shantanu Sinha
    • Organizer
      Experimental Biology 2008
    • Place of Presentation
      San Diego, CA, USA
    • Related Report
      2010 Final Research Report
  • [Book] 運動生理学のニューエビデンス(宮村実晴編集)(神経・筋活動分布)2010

    • Author(s)
      衣笠竜太
    • Publisher
      真興交易(株)医書出版部,東京
    • Related Report
      2010 Final Research Report
  • [Book] 運動生理学のニューエビデンス2010

    • Author(s)
      衣笠竜太
    • Total Pages
      464
    • Publisher
      神経・筋活動分布
    • Related Report
      2010 Annual Research Report
  • [Remarks] 受賞 American College of Sport Medicine, Biomechanics Interest Group : Vendor's Innovation in Research Award, 2009.

    • Related Report
      2010 Final Research Report
  • [Remarks] ホームページ

    • URL

      http://www.aoni.waseda.jp/rkinugasa/japn.htm

    • Related Report
      2010 Final Research Report
  • [Remarks]

    • URL

      http://www.aoni.waseda.jp/rkinugasa/japn.htm

    • Related Report
      2009 Annual Research Report

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Published: 2008-04-01   Modified: 2016-11-18  

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