Can hypoventilation training be an alternative method to hypoxic training?

2023 Fiscal Year Final Research Report

• Project/Area Number: 20K11431
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 59020:Sports sciences-related
• Research Institution: Yamanashi Gakuin University
• Principal Investigator: NAKAGAKI Kohei 山梨学院大学, スポーツ科学部, 教授 (30549473)
• Co-Investigator(Kenkyū-buntansha): 今 有礼 東洋大学, ライフデザイン学部, 教授 (00455445)
• Project Period (FY): 2020-04-01 – 2024-03-31
• Keywords: 低換気 / 止息 / 呼吸制限 / 低酸素

Outline of Final Research Achievements

The purposes of this study were to investigate 1) the physiological responses during voluntary respiratory restriction exercise under normoxic conditions and 2) the effects of voluntary respiratory restriction(hypoventilation) training under normoxic conditions. The results of this study showed that, in contrast to previous studies, voluntary respiratory restriction did not decrease oxygen uptake during exercise. Physiological responses during exercise with voluntary respiratory restriction were similar to during normal breathing exercise in a hypoxic environment (17.4 % oxygen concentration). It was also suggested that hypoventilation training may reduce carbon dioxide sensitivity.

Free Research Field

トレーニング科学

Academic Significance and Societal Importance of the Research Achievements

本研究によって，随意的な呼吸制限を伴う運動時の生理応答（心拍数，酸素飽和度及び血中乳酸濃度）は，標高1500 m程度の準高地環境において通常呼吸で運動した際の生理応答と同等であることが明らかとなった．また，随意的な呼吸制限を伴う低換気トレーニングは，二酸化炭素の呼吸感受性を低下させ，運動時の主観的運動強を低下させる可能性が示唆された．これらの知見から，低換気トレーニングは，1）準高地トレーニングの代替手段として，2）二酸化炭素の感受性を低下させるためのトレーニングとして効果的になる可能性が示された．