オキシダティブ・ストレスは,カレッジ・クロス・カントリー・スキーヤーで,中期と後期に
Scott P Jerome1, Kriya L Dunlap1,2, Ava M Parrish1
1Department of Chemistry & Biochemistry, University of Alaska Fairbanks, Fairbanks, AK, USA.
まとめ
過剰トレーニング症候群は 酸化ストレスと関係があるかもしれません 性能の低下を経験した耐久性アスリートは,性能の低下のない人と比較して,シーズン後の回復中により高い酸化ストレスマーカーを示した.
科学分野:
- 運動 生理学
- 生物化学
- スポーツ科学
背景:
- 酸化ストレス (OS) 仮説は,激しい運動中にフリーラジカルの生成が増加すると,筋肉の疲労とパフォーマンスの低下につながることを示唆しています.
- 以前の研究では,トレーニングマクロサイクル内の運動直前と運動直後のOSマーカーを調査しました.
研究 の 目的:
- 競技マクロサイクルと,その後の回復マクロサイクル間の耐久力アスリートのOSを比較する.
- 競技シーズン中に原因不明のパフォーマンスの低下を経験した選手を特定し,そのOSレベルを,そうでない選手と比較する.
主な方法:
- 15人のクロスカントリースキーチームのメンバーが シーズン半ばとシーズン後の血液サンプルを提供した.
- 血は4-ヒドロキシノネナル (HNE),ニトロチロシン,窒素酸化物 (NOX),超酸化物ディスミュータゼ (SOD) について分析された.
- 統計的有意性は,ウィルコクソンとマン・ウィートニー試験を用いて決定された.
主要な成果:
- スーパーオキシド・ディスミュータゼ (SOD) の活性度は,シーズン中期と比較して,シーズン後期において有意に高かった.
- 6人のアスリート (6D) は説明不能なパフォーマンスの低下を報告した.
- 6Dグループは,パフォーマンスの低下のないアスリートと比較して,シーズン後のHNE濃度が有意に高かった.
結論:
- 競技シーズン中にパフォーマンスの低下を報告したアスリートは,シーズン後の回復期間に酸化ストレスと緩和の兆候を高めた.
- 発見は,酸化ストレスマーカーと耐久力アスリートのパフォーマンスの低下との潜在的な関連を示唆しています.
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