Effects of combined heat maintenance strategies during half-time on exercise performance and physical responses

2021 Fiscal Year Final Research Report

• Project/Area Number: 19K24313
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Multi-year Fund
• Review Section: 0909:Sports sciences, physical education, health sciences, and related fields
• Research Institution: Hiroshima University
• Principal Investigator: YANAOKA TAKUMA 広島大学, 人間社会科学研究科(教), 准教授 (20846951)
• Project Period (FY): 2019-08-30 – 2022-03-31
• Keywords: 球技系競技 / ハーフタイム / Re-warm up / 体温 / 筋酸素動態 / 筋電図 / エネルギー代謝 / コンディショニング

Outline of Final Research Achievements

Maintaining high-intensity exercise performance is an important factor to impact on match outcome in intermittent team sport competitions. However, resting during half-time decreases body temperatures, muscle activity, and energy metabolism, resulting in reduced high-intensity exercise performance at the initial part of the second half. In this study, we examined the effects of warming up during half-time (re-warm up) and wearing external warming devices on body temperature, muscle activity, energy metabolism, and exercise performance. The results showed that the re-warm up increased subsequent muscle activity and energy metabolism, and the wearing external warming device maintained body temperature. However, the combined approach did not appear the most beneficial for exercise performance.

Free Research Field

運動生理学

Academic Significance and Societal Importance of the Research Achievements

球技系競技のハーフタイムにおいて、実用性の高いリウォームアップ・プロトコルによって、その後の運動パフォーマンスが維持されたことが臨床的に意義深い。また、そのメカニズムを網羅的に検証できた点で学術的な価値が高い。
また、リウォームアップによる体温の維持は達成されなかったが、外部保温器具と組み合わせることで体温が維持された。体温低下はスポーツ外傷のリスク増加の要因であり、競技者の安全の担保にも貢献する。