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ノルモキシアとヒポキシアの激しい認知運動二重タスク中の持続的注意力パフォーマンスと神経筋疲労における性差

Thomas Goepp1, Mark Hayes2, Hervé Di Domenico1

  • 1Inter-University Laboratory of Human Movement Sciences, LIBM University Savoie Mont-Blanc, Chambéry, France.

International journal of sports physiology and performance
|August 23, 2025
PubMed
まとめ

ノルモキシアとヒポキシアの激しい認知運動二重タスク (CMDT) は,男性と女性の神経筋疲労,持続的注意力,脳の酸素供給に等しく影響し,これらの反応に性差はないことを示しています.

キーワード:
高度脳について運動する疲労性別について

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科学分野:

  • 運動 生理学
  • 認知神経科学
  • 人間 の 業績

背景:

  • 女性では運動中に筋肉の疲労抵抗性が高く,低酸素による脳の酸素飽和度は低い.
  • 全身運動による認知運動二重タスク (CMDT) は,神経筋疲労と認知の低下を強める.特に低酸素状態では.

研究 の 目的:

  • 激しいCMDTに対する生理学的および認知的反応の性別による差異をノルモキシックおよびヒポキシック条件下で調査する.
  • ダブルタスク運動中の認知機能と神経筋疲労に対する低酸素の影響を評価する.

主な方法:

  • 健康な成人22人 (女性11人) は,ノーマキシアとヒポキシアで認知作業,サイクリング作業,CMDTを行いました.
  • 膝の伸縮器の神経筋疲労は電気刺激を用いて測定された.
  • 前頭皮質の酸素化は,認知作業中に近赤外線光譜を用いて評価された.

主要な成果:

  • 認知機能の低下は,男性と女性において,ノルモキシアとヒポキシアの両方で類似していました.
  • 運動後の神経筋疲労と最大自発的活性化障害は,性別と状態にかかわらず有意であった.
  • 前頭皮質の酸素化は,低酸素期におけるCMDTの間,性別による差異を示さなかった.

結論:

  • ノルモキシアとヒポキシアの全身の激しいCMDTは,神経筋機能,持続的注意力,そして脳の酸素供給に負の影響を及ぼします.
  • 性別による運動反応の生理学的差異があるにもかかわらず,激しいCMDTがこれらの測定値に与える影響は性別によって異なります.