中年における静止老化の心臓効果の逆転 - ランダム化制御試験:心臓機能不全の予防への影響
Erin J Howden1,2,3, Satyam Sarma1,2, Justin S Lawley1,2
1Institute for Exercise and Environmental Medicine, Texas Health Presbyterian Hospital, Dallas (E.J.H., S.S., J.S.L., M.O., W.C., D.S., M.A.U., B.D.L.).
Circulation
|January 10, 2018
まとめ
中年の定期的な運動は 心臓呼吸器のフィットネスを大幅に改善し 心臓の硬さを軽減します この介入は,老化に関連した硬さの増加を相殺することによって,噴出分子を保存した心不全を予防することができます.
科学分野:
- 心臓病科
- 運動 生理学
- 予防 医療
背景:
- 中年の体調不良は,心不全の重要な危険因子であり,特に心不全と保存されたエジェクション分数 (HFpEF) と呼ばれるサブタイプです.
- 静止状態の老化による左心室の硬化が,HFpEFの発生に寄与する可能性が高い.
- この研究では,健康な中年の成人のLVの硬さに対する構造化された運動プログラムの影響を調査した.
研究 の 目的:
- 左心室の硬さに対する2年間の監督された高強度運動の効果を測定する.
- 運動訓練が心臓機能 (最大酸素吸収) を改善し,心臓のメカニズムに変化をもたらすかどうかを評価する.
- 年齢に伴う心臓の硬化を緩和し,HFpEFのリスクを減らすための運動の可能性を評価する.
主な方法:
- 61人の健康な中年者 (平均年齢53歳) を対象とした前向きなランダム化対照試験です.
- 参加者は2年間の監督された高強度運動訓練 (n=34) または注意コントロールグループ (n=27) に割り当てられました.
- 左心室 (LV) の硬さについては,右心室のキャセテリゼーションと,腹圧と体積の関係を分析するために,プリロード操作による3次元エコーカルディオグラフィーを用いて評価した. 最大酸素摂取量 (Vo2max) を測定し,体力レベルを定量化しました.
主要な成果:
- 運動訓練群は,対照群と比較して最大酸素摂取量 (Vo2max) が18%増加した.
- 運動グループでは LVの硬さが有意に低下した (P=0. 0018),これは終端の腹圧と体積の関係が低下したことを示し,対照群では変化はなかった (P=0. 83).
- 運動訓練により,肺毛細血管の圧が変化することなく,肺毛細血管の末端流動体積が増加し,特定の充填圧で脳卒中の量が増えた (P=0. 007).
結論:
- 2年間の監督された運動訓練は,以前は静止状態だった中年の成人の心臓の健康状態を効果的に改善し,心臓の硬さを減少させた.
- 定期的な運動は,老化に伴う有害な心硬さの増加を防ぐことで,保存されたエジェクション分数 (HFpEF) の心不全の発生に対する保護策を提供することができる.
- これらの発見は 運動による介入が 心血管の健康を向上させ 老化中の心臓病を予防する可能性を 強調しています
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