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Effects of rapid weight loss on body water and electrolyte control, and oxidative stress for weight class athletes

Research Project

Project/Area Number 16K21685
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Sports science
Developmental mechanisms and the body works
Research InstitutionNational Agency for the Advancement of Sports and Health

Principal Investigator

Nishimaki Mio  独立行政法人日本スポーツ振興センター国立スポーツ科学センター, スポーツ科学部, 契約職員 (20757538)

Project Period (FY) 2016-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2018: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2017: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2016: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Keywords減量 / 脱水 / 酸化ストレス / 減量期間 / 急速減量 / 血清アルドステロン / 電解質濃度 / レスリング選手 / 抗酸化能
Outline of Final Research Achievements

Many reports have been published on the negative health effects of rapid weight loss (RWL) in wrestlers. This study aim was the effects of different periods of RWL on dehydration state and oxidative stress.Participants were nine male collegiate wrestlers who reduce their body mass by 5% within short period in randomized order using the same methods. They have experienced 1-day, 3-days and 7-days) weight loss separated by more than 4 weeks. All participants reduced 5% of their body mass in all trials. Following the weight loss, they tried to regain all of their lost weight with an ad libitum diet for 14 h. Body composition and biochemical variables were measured at baseline and immediately after weight loss and weight regain.For plasma aldosterone concentrations and plasma d-ROMs concentrations, two-way analysis of variance revealed the main effect of time (p<0.05). RWL is surmised to have increased oxidative stress via dehydration and elevated levels of aldosterone.

Academic Significance and Societal Importance of the Research Achievements

急速減量は極端な食事摂取制限により身体を負のエネルギーバランスにならないよう恒常性を保つ.成人であっても急速減量は脱水,低血糖,体温調節機能低下,免疫機能低下などを引き起こすが,成長期ではさらに大きな影響が予想される。成長期にある高校生年代は骨格や筋肉の発達途上にあり、負のエネルギーバランスの状態は発育・発達やホルモンバランスの乱れにつながる.成長期における急速減量は一時的なパフォーマンスだけでなく,骨格や筋肉の発達を阻害し,その後の長期的なパフォーマンスにまで影響する可能性がある.本研究の発展に伴い減量の方法に関する年代別及び性別の基準を設定することが可能になる.

Report

(5 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (4 results)

All 2019 2018 2017

All Journal Article (3 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 3 results,  Open Access: 3 results) Presentation (1 results)

  • [Journal Article] When and How Should Chinese Pregnant Women Exercise? A Longitudinal Study in China2019

    • Author(s)
      Xiang Mi、Konishi Masayuki、Hu Huanhuan、Nishimaki Mio、Kim Hyeon-Ki、Tabata Hiroki、Shimizu Hisao、Fang Yue、Li Xueyuan、Xu Jiawei、Zhang Zhiruo、Liang Huigang、Arao Takashi、Sakamoto Shizuo
    • Journal Title

      International Journal of Environmental Research and Public Health

      Volume: 17 Issue: 1 Pages: 180-180

    • DOI

      10.3390/ijerph17010180

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Effects of different periods of rapid weight loss on dehydration and oxidative stress.2018

    • Author(s)
      Mio Nishimaki, Hiroki Tabata, Masayuki Konishi, Stefan Pettersson, Shizuo Sakamoto
    • Journal Title

      Archives of Budo

      Volume: 14 Pages: 319-327

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Effect of obesity-related gene polymorphisms on weight loss of female wrestlers2018

    • Author(s)
      Mio Nishimaki, Shizuo Sakamoto
    • Journal Title

      Archives of Budo

      Volume: 14 Pages: 117-123

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 中学生レスリング選手の減量に関する実態調査2017

    • Author(s)
      西牧未央
    • Organizer
      女性スポーツ医学研究会
    • Related Report
      2017 Research-status Report

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Published: 2016-04-21   Modified: 2021-02-19  

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