運動後のイシュケミアによる筋肉のメタボレフレクスの活性化により,ヒトでは局所的血管収縮の証拠なしに,肋間筋の血流指数が増加する
Masashi Ichinose1, Mikie Nakabayashi2,3, Yumie Ono4
1Human Integrative Physiology Laboratory, School of Business Administration, Meiji University, Tokyo, Japan.
Journal of applied physiology (Bethesda, Md. : 1985)
|September 5, 2025
まとめ
筋肉のメタボレフレクスは,運動中に活性化され,肋間筋への血流を増やす. この反射は,呼吸器の筋肉の血流を血圧反応によって促進し,呼吸を促します.
科学分野:
- 運動 生理学
- 心血管の調節
- 呼吸器の生理学
背景:
- 筋肉のメタボレフレクスは 高強度運動によって引き起こされ 呼吸の需要が増加します
- 呼吸器の筋肉の血流,特に肋間筋への影響は十分に理解されていません.
研究 の 目的:
- 前腕のメタボレフレクスの活性化が肋間間筋の血流に影響するかどうかを判断する.
- これらの変化の背後にある血液動力学的メカニズムを調査する.
主な方法:
- 健康な男性は,運動後の筋肉缺血 (PEMI) またはコントロール回復を伴う同位体握り運動を行いました.
- 肋間筋マイクロ血管血流指数 (BFI) は,拡散相関スペクトロスコーピー (DCS) を使用して測定されました.
- 心血管変数と血管抵抗指数 (VRI) をモニタリングし,呼吸を抑える間での分析により,運動障害を最小限に抑えた.
主要な成果:
- PEMIでは,静止状態と対照状態と比較して,平均動脈圧 (MAP) と肋間間動脈圧 (BFI) が著しく上昇した.
- PEMIの間,血管間抵抗指数 (VRI) は変化しませんでした.
- これらの発見は,呼吸器の筋肉への血流の反射媒介による増加を示しています.
結論:
- 筋肉のメタボレフレクスの活性化により,プレッサー反応により,肋間筋の血流が強化されます.
- 血流の増加は,有意な局所的血管収縮なしに起こります.
- これは,運動中の呼吸器の筋肉 perfusion をサポートするメタボレフレクスの役割を強調します.
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