Influence of cold-induced diuresis on endurance exercise performance and its countermeasures

• Project/Area Number: 25750332
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Sports science
• Research Institution: Osaka City University
• Principal Investigator: IMAI Daiki 大阪市立大学, 都市健康・スポーツ研究センター, 講師 (40614483)
• Project Period (FY): 2013-04-01 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000); Fiscal Year 2014: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2013: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
• Keywords: 寒冷利尿 / 脱水 / 持久的運動

Outline of Final Research Achievements

This study investigated the effects of cold diuresis on endurance exercise performance. Cold-induced diuresis occurred by lowered skin temperature due to cold exposure and decreased plasma volume. Plasma lactate concentration before and during exercise increased and lactate threshold declined. As a result, exercise duration reduced in lowered skin temperature compared with normothermia. Therefore we conclude that when we do endurance exercise in cold environment, we should take countermeasures to maintain a steady level of skin temperature.

Research Products

• [Journal Article] Abdominal obesity augments futher reduction in the cough capacities by supination of middle-aged and elderly women (2014)
  • Author(s): Yamashina Y, Yokoyama H, Tabira K, Masuda T, Suzuki A, Takeda R, Naghavi N, Imai D, Okazaki K, Miyagawa T
  • Journal Title: Biophilia Volume: 10 Pages: 17-23
  • Peer Reviewed
• [Journal Article] Thermoregulatory responses are attenuated after fructose but not glucose intake. (2014)
  • Author(s): Suzuki A, Okazaki K, Imai D, Takeda R, Naghavi N, Yokoyama H, Miyagawa T
  • Journal Title: Med Sci Sports Exerc Volume: 46 Issue: 7 Pages: 1452-1461
  • DOI: 10.1249/mss.0000000000000233
  • Peer Reviewed / Acknowledgement Compliant
• [Presentation] Skin warm/ cold threshold during passive heating are attenuated in elderly than young men (2014)
  • Author(s): Takeda R, Okazaki K, Naghavi N, Yamashina Y, Hirasawa Y, Suzuki A, Imai D, Yokoyama H, Miyagawa T
  • Organizer: ACSM conference on Integrative Physiology of Exercise
  • Place of Presentation: Miami (USA)
  • Year and Date: 2014-09-17 – 2014-09-20
• [Presentation] Lactate threshold is decreased by skin surface cooling prior to exercise in cool environment (2014)
  • Author(s): Imai D, Okazaki K, Yokoyama H, Takeda R, Naghavi N, Yamashina Y, Hirasawa Y, Ota A, Matsumura S, Miyagawa T
  • Organizer: ACSM conference on Integrative Physiology of Exercise
  • Place of Presentation: Miami (USA)
  • Year and Date: 2014-09-17 – 2014-09-20
• [Presentation] 中高年者の腹部肥満は仰臥位における咳嗽能力の低下を増強する (2014)
  • Author(s): 山科吉弘、横山久代、岡﨑和伸、今井大喜、鈴木明菜、竹田良祐、Naghavi Nooshin、宮側敏明
  • Organizer: 第24回関西臨床スポーツ医・科学研究会
  • Place of Presentation: 薬業年金会館（大阪府･大阪市）
  • Year and Date: 2014-06-21
• [Book] ニュー運動生理学Ⅱ Section15 運動と血液 3 血液粘度 (2015)
  • Author(s): 今井大喜、岡﨑和伸
  • Total Pages: 408
  • Publisher: 真興交易（株）医書出版部