Effect of dual stress due to cold and mental stress on cognitive function and motor ability and its countermeasure

• Project/Area Number: 17K13189
• 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)
• Research Collaborator: OKAZAKI Kazunobu ; YOKOYAMA Hisayo ; TAKEDA Ryosuke ; KAWAI Eriko ; SAHO Kosuke ; OTA Akemi
• Project Period (FY): 2017-04-01 – 2019-03-31
• Project Status: Completed (Fiscal Year 2018)
• Budget Amount: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000); Fiscal Year 2018: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2017: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
• Keywords: 寒冷ストレス / 精神性ストレス / 交感神経活動 / 認知機能 / 持久的運動能 / 精神ストレス / 瞬発的運動能 / 運動能 / アロマ

Outline of Final Research Achievements

We tested the hypothesis that dual stress due to cold stimulation and a mental task decreases cognitive function and endurance exercise performance. Young male subjects participants performed the flanker task and trail making test before and after a mental task with cold exposure. In addition, a cycling test was carried out to exhaustion at 80% VO2peak. While sympathetic nerve activity was enhanced and the sensation of fatigue was increased, cognitive function and endurance exercise performance were not lowered by dual stress.

Academic Significance and Societal Importance of the Research Achievements

寒冷ストレスと精神性ストレスによる二重の生体負荷が認知機能、運動能に及ぼす影響について明らかにしたことは、フィジカルな現象に対するメンタルな側面を定量的に表現した事になり、目下、災害対策・山岳遭難さらにはスポーツ現場で実際に起きている事象の具体的かつ論理的な解釈に寄与する。さらには運動・スポーツ活動を国民がより安心・安全そして効果的に実施するための方法に対する論拠を提供することとなる。

Research Products

• [Presentation] The effects of core and skin temperatures and dehydration on heart rate response during interval exercise in warm and cool conditions. (2018)
  • Author(s): Takeda R, Imai D, Kawai E, Ota A, Saho K, Morita E, Suzuki Y, Yokoyama H, Okazaki K
  • Organizer: Experimental Biology 2018
  • Int'l Joint Research
• [Presentation] Exercise in a warm condition enhances plasma volume expansion compared to a cool condition with an increased skin but not core temperature. (2018)
  • Author(s): Okazaki K, Takeda R, Imai D, Kawai E, Ota A, Saho K, Morita E, Suzuki Y, Yokoyama H
  • Organizer: Experimental Biology 2018
  • Int'l Joint Research
• [Presentation] Effects of fragrance inhalation of essential oil on control of blood pressure and muscle sympathetic nerve activity in humans. (2018)
  • Author(s): Kawai E, Hanno G, Takeda R, Ota A, Morita E, Imai D, Suzuki Y, Yokoyama H, Okazaki K
  • Organizer: Experimental Biology 2018
  • Int'l Joint Research
• [Presentation] 高強度間欠的運動時の心拍応答に及ぼす皮膚温度上昇の影響． (2018)
  • Author(s): 竹田良祐，今井大喜，河合英里子，太田暁美，佐保光祐，森田恵美子，鈴木雄太，横山久代，岡崎和伸
  • Organizer: 第73回日本体力医学会大会
• [Presentation] 精油の匂い吸入に対する血圧および筋交感神経活動の応答． (2018)
  • Author(s): 河合英理子，竹田良祐，太田暁美，森田恵美子，今井大喜，鈴木雄太，横山久代，岡﨑和伸
  • Organizer: 第73回日本体力医学会大会