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After glycolysis, the charged pyruvate molecules enter the mitochondria via active transport and undergo three enzymatic reactions. These reactions ensure that pyruvate can enter the next metabolic pathway so that energy stored in the pyruvate molecules can be harnessed by the cells.
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Nearly all the energy used by cells comes from the bonds that make up complex organic compounds. These organic compounds are broken down into simpler molecules, such as glucose. As a result, cells extract energy from glucose over many chemical reactions—a process called cellular respiration.
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Assessing Energy Substrate Oxidation In Vitro with 14CO2 Trapping
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基质氧化不会影响中距离跑步表现:一个随机控制的交叉试验.

Alex Buga1, Jeffrey D Buxton2, Emma Plank2

  • 1Department of Human Sciences, The Ohio State University, Columbus, OH 43210, USA.

Nutrients
|September 13, 2025
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概括

首选基质氧化不会显著影响中距离跑步表现,即使具有不同的代谢概况. 这项研究挑战了以前关于基板利用决定有氧能力的观念.

关键词:
碳水化合物是一种碳水化合物.能源酒吧能源酒吧基因的是一种基因素.补充补充补充补充补充时间审判审判时间审判.

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科学领域:

  • 运动生理学 运动生理学
  • 营养科学 营养科学
  • 体育表现 体育表现 体育表现

背景情况:

  • 最近的研究质疑优先基质氧化在运动表现中的作用.
  • 控制葡萄糖和运动引起的低血糖 (EIH) 对于准确的性能评估至关重要.

研究的目的:

  • 研究运动前食 (低碳水化合物高脂肪与高碳水化合物低脂肪) 对中距离跑步表现的影响.
  • 为了确定偏好的基质氧化是否会影响养状态下的性能.

主要方法:

  • 随机交叉研究与休跑步者 (n=30).
  • 参与者在食用LCHF或HCLF等热量餐后完成了5K和10K计时试验.
  • 测量包括时间试验性能,基质氧化,血液代谢物,心率和感知到的劳动力.

主要成果:

  • 与HCLF相比,LCHF食显著改变了基质氧化 (增加脂肪氧化,减少RER).
  • 尽管有代谢差异,5K和10K的计时表现在LCHF和HCLF条件之间是相似的.
  • LCHF餐增加了腹感,而HCLF餐导致了血糖的上升.

结论:

  • 首选的基质氧化不是中距离有氧性能的主要决定因素.
  • 这些发现支持了最近的证据,这些证据挑战了对基质利用在性能中的作用的传统观点.