Effect of respiratory system on circulatory regulation during exercise

2014 Fiscal Year Final Research Report

• Project/Area Number: 24300222
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Sports science
• Research Institution: Nagoya University
• Principal Investigator: KATAYAMA KEISHO 名古屋大学, 学内共同利用施設等, 准教授 (40343214)
• Co-Investigator(Kenkyū-buntansha): ISHIDA Koji 名古屋大学, 総合保健体育科学センター, 教授 (50193321) ; SAITO Mitsuru 愛知学院大学, 心身科学部, 教授 (80126862)
• Co-Investigator(Renkei-kenkyūsha): KOIKE Teruhiko 名古屋大学, 総合保健体育科学センター, 准教授 (90262906) ; IWAMOTO Erika 札幌医科大学, 保健医療学部, 講師 (40632782)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 呼吸筋 / 代謝受容器反射 / 筋交感神経活動 / 血圧

Outline of Final Research Achievements

It has been thought that an increase in respiratory muscle activity affects cardiovascular regulation during exercise. We found that an enhancement of inspiratory muscle work causes an increase in sympathetic vasomotor outflow with a corresponding enhancement of arterial blood pressure during exercise. An enhancement of inspiratory muscle activity under hypoxic condition leads to large increases in sympathetic vasomotor outflow and BP. It is possible that this large vasoconstrictor activity reduces blood flow and oxygen transport to the working limb, thereby exacerbating limb fatigue and compromising exercise performance.

Free Research Field

運動生理学