エクセンティック膝の拡張 トークは,高レベルの女性アスリートにおける月経周期の各フェーズで異なっている
Kristin A Johnson1, Brian R Wolf2, Richard K Shields3
1Department of Health and Exercise Science,Colorado State University, Fort Collins, CO, USA.
International journal of sports physiology and performance
|February 19, 2026
まとめ
女性のアスリートは,月経周期全体で変な膝の伸縮トルクの変動を示し,月経期中期に高いトルクが観察されます. テストステロンレベルは,膝のトルクと逆に関連しており,運動能力に対する潜在的なホルモンの影響を示唆しています.
科学分野:
- スポーツ医学 スポーツ医学
- 運動生理学 運動生理学
- エンドクリノロジー エンドクリノロジー
背景:
- エクセンティックな膝の伸縮トルクは,運動能力と膝の安定性にとって極めて重要です.
- 女性のアスリートは,月経周期を通してパフォーマンスと怪我率の違いを示します.
- 女性のアスリートの特異的な膝の伸縮トルクに対する月経周期の相の影響は不明である.
研究 の 目的:
- 月経周期の各段階において,高レベルの女性アスリートたちの間での,奇妙な膝の伸縮トルクの違いを調査する.
- これらのアスリートにおける性ホルモンと膝のトルクの関係を探求するために.
主な方法:
- 21人の女子大学院の選手が,イソキネティック・ダイナモメーターを用いて,イソメトリックとエクセントリックの膝のトルクを評価した.
- 月経周期の相 (早期の卵泡,後期の卵泡,中期の卵泡) は,周期日,排卵検査,血清ホルモン分析により確認されました.
- 統計的分析には,線形混合効果モデルと,トルクの違いとホルモン関連性を評価するための相関テストが含まれていた.
主要な成果:
- エクセンティックな膝の伸縮モルクは,月経周期の各段階 (P=0.025~0.042) において著しく変化し,末期の葉っぱ期と比較して,中期の葉っぱ期においてより高かった.
- 膝のイソメトリックトルクは,サイクルフェーズ間の有意な違いを示さなかった (P > .475).
- テストステロンは,体脂肪量 (r = -.509 から - .315) を制御する際に,イソメトリックとエキセントリックの両方の膝の伸縮トルクと逆相関していた.
結論:
- 性ホルモンは,エリート女性アスリートにおける特異的な膝の伸縮トルクにわずかな影響を与えるようです.
- これらの発見は,月経周期を通して女性の運動能力と膝の機能に影響を与える生理学的要因を理解するのに役立ちます.
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