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Effect of high-fat diet on skeletal muscle and liver glycogen

Research Project

Project/Area Number 18K17816
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 59020:Sports sciences-related
Research InstitutionTenri University

Principal Investigator

IWAYAMA Kaito  天理大学, 体育学部, 講師 (30781249)

Project Period (FY) 2018-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2019: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2018: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Keywordsグリコーゲン / 高脂肪食 / 脂質代謝 / 不飽和脂肪酸 / 炭素磁気共鳴分光法
Outline of Final Research Achievements

The main energy sources utilized during exercise are carbohydrates (i.e. glycogen) and fats. This study examined the effects of different pre-exercise diets on the ratio of carbohydrate- and fat-derived energy utilized during exercise. Three diets were compared: a diet high-carbohydrate, a diet high- saturated fatty acids, and a diet high-unsaturated fatty acids. Results showed that diets high-saturated or high-unsaturated fatty acids utilized less glycogen during exercise than diets high-carbohydrate. No difference was found between saturated and unsaturated fatty acids. Since lower glycogen utilization during exercise is desirable for endurance exercise, the results suggest that a diet high-fat prior to exercise is beneficial, regardless of saturated/unsaturated status.

Academic Significance and Societal Importance of the Research Achievements

フルマラソンなど長時間の持久性運動前はご飯やうどんなど糖質の多い食事をすることが推奨されている。これは運動前にエネルギー源であるグリコーゲンを蓄えておくことで、終盤のバテを防ぐことが目的である。糖質の多い食事の代わりに脂質の多い食事をすると、エネルギー貯蔵を増やすことはできないが、エネルギーの使い方が変わる(燃費が向上する)ことが指摘されている。一口に脂質といっても様々な種類があるため、本研究では燃費向上のためにどのような脂質が有効かを検討した。その結果、脂質の種類による差が認められなかった。したがって実践する場合はどのような脂質でも燃費向上が期待できると考えられる。

Report

(6 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (4 results)

All 2023 2020 2019 2018

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

  • [Journal Article] Exercise Timing Matters for Glycogen Metabolism and Accumulated Fat Oxidation over 24 h2023

    • Author(s)
      Iwayama Kaito、Seol Jaehoon、Tokuyama Kumpei
    • Journal Title

      Nutrients

      Volume: 15 Issue: 5 Pages: 1109-1109

    • DOI

      10.3390/nu15051109

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Diurnal variation in the glycogen content of the human liver using 13C MRS2020

    • Author(s)
      Kaito Iwayama, Takahiro Onishi, Katsuya Maruyama, Hideyuki Takahashi
    • Journal Title

      NMR in Biomedicine

      Volume: 33 Issue: 6

    • DOI

      10.1002/nbm.4289

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] 運動するタイミングの違いが骨格筋および肝臓グリコーゲン濃度の変動に及ぼす影響2019

    • Author(s)
      岩山海渡、田名辺陽子、丹治史弥、大西貴弘、丸山克也、髙橋英幸
    • Organizer
      第74回日本体力医学会大会
    • Related Report
      2019 Research-status Report
  • [Presentation] 運動前の高脂肪食摂取がグリコーゲン利用に及ぼす影響2018

    • Author(s)
      岩山海渡、田名辺陽子、矢島克彦、丹治史弥、大西貴弘、丸山克也、高橋英幸
    • Organizer
      第73回日本体力医学会大会
    • Related Report
      2018 Research-status Report

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Published: 2018-04-23   Modified: 2024-01-30  

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