Exploratory Research on Optimal Body Cooling Strategies in Outdoor Hot Environments - Focusing on Solar radiation -

2022 Fiscal Year Final Research Report

• Project/Area Number: 19K20032
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 59020:Sports sciences-related
• Research Institution: Hokkai-Gakuen University (2021-2022); National Agency for the Advancement of Sports and Health (2019-2020)
• Principal Investigator: Naito Takashi 北海学園大学, 法学部, 講師 (20806278)
• Project Period (FY): 2019-04-01 – 2023-03-31
• Keywords: 輻射熱 / 日射量 / 晴天 / 身体冷却 / 深部体温 / 平均皮膚温 / 運動能力

Outline of Final Research Achievements

The purpose of this study were to (1) clarify the effects of various types of solar radiation on body temperature dynamics and endurance exercise capacity in outdoor heat, and (2) clarify the effects of various types of body cooling in high solar radiation.
The results of this study revealed that (1) skin temperature is a determinant of endurance exercise capacity when solar radiation from sunlight is added to a hot environment, and (2) combined body cooling by ice slurry ingestion and fun cooling before exercise did not lead to significant improvement in endurance exercise capacity compared to ice slurry ingestion alone. (3) Ice slurry ingestion and fun cooling between exercise reduced deep body temperature estimates from the abdomen, tympanic temperature and mean skin temperature compared to ice slurry ingestion alone.

Free Research Field

運動生理学、環境生理学

Academic Significance and Societal Importance of the Research Achievements

本研究の成果は競技場面における運動能力向上のみならず、社会に対する炎天下での農作業や熱中症予防などの安全な生涯スポーツの実施に貢献できると考えられる。