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関連する概念動画

Exercise Stress Test01:26

Exercise Stress Test

488
Introduction
Exercise stress testing, commonly known as a treadmill test, is a noninvasive procedure used to evaluate cardiovascular function and diagnose heart conditions.
Definition
An exercise stress test measures the heart's response to exertion using a treadmill or stationary bicycle. Chest electrodes record the heart's electrical activity through an ECG, and blood pressure is monitored regularly.
Purposes
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Muscle Recovery and Fatigue01:24

Muscle Recovery and Fatigue

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Muscle fatigue refers to the decline in a muscle's ability to maintain the force of contraction after prolonged activity. It primarily stems from changes within muscle fibers. Even before experiencing muscle fatigue, one may feel tired and have the urge to stop the activity. This response, known as central fatigue, occurs due to changes in the central nervous system, namely the brain and spinal cord. While there is no single mechanism that induces fatigue, it may serve as a protective...
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Evaluation of Blood Lactate and Plasma Insulin During High-intensity Exercise by Antecubital Vein Catheterization
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血中乳酸値を用いた運動の強度設定の有効性

Momoko Kobayashi1, Natsuki Yamamura2, Takahiro Mukaimoto3

  • 1Graduate School of Pharmaceutical Sciences, Tokyo University of Science, Tokyo, Japan.

The Journal of sports medicine and physical fitness
|September 5, 2025
PubMed
まとめ

血中乳酸のレベルは 運動の強度を効果的に決定し,高強度走行後に一時的な血糖値上昇を明らかにします. 運動中の代謝の変化を示しています.

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科学分野:

  • 運動 生理学
  • スポーツ科学
  • 生物化学

背景:

  • 最大心拍数と酸素の吸収は 運動の強さを測る一般的な指標です
  • 血中乳酸のレベルは 耐久性に関するより敏感なバイオマーカーです
  • この研究では,乳酸ベースの濃度が検証され,代謝反応が検証されます.

研究 の 目的:

  • ランニング中に血中乳酸濃度によって決定される運動の強さを評価する.
  • 高強度および低強度運動中の血糖とβ-ヒドロキシブチラート動態の分析.
  • エネルギー代謝が 運動の強さに応じて変化することを理解する

主な方法:

  • 12人の参加者の運動強度の測定のための乳酸曲線試験
  • 4つの走行試験:低強度30分,高強度30分,低強度60分,そしてコントロール.
  • 血糖とβ-ヒドロキシブチラートは,運動前と運動後 (240分まで) の指先の刺で測定される.

主要な成果:

  • 高強度走行後30分間の血糖値の有意な上昇,30分以内にベースラインに戻る.
  • 高強度30分と低強度60分で150分後に観測されたベータ・ヒドロキシブチラート濃度の大幅な増加.
  • メタボリックマーカーの変化は,異なる運動条件でエネルギー基板の利用を反映した.

結論:

  • 運動後の一時的な血糖上昇を誘導する運動条件を血液中乳酸の測定で確認できます.
  • グルコースとベータ・ヒドロキシブチラートの変化は,エネルギー代謝の変化の洞察を与えてくれます.
  • エネルギー代謝のメカニズムを完全に解明するには,追加の代謝指標に関するさらなる研究が必要です.