在肌肉糖原不可用的情况下,运动前碳水化合物的剂量反应效应:麦克阿德尔病的洞察力
Pedro L Valenzuela1, Alfredo Santalla2, Lidia B Alejo3
1Physical Activity and Health Research Group ("PaHerg"), Research Institute of Hospital "12 de Octubre" ("imas12"), Madrid 28041, Spain; Department of Systems Biology, University of Alcalá, Madrid 28871, Spain.
Journal of sport and health science
|November 29, 2023
概括
碳水化合物 (CHO) 摄入改善了麦克阿德尔病患者的运动能力,更高的剂量产生了更大的益处. 这项研究调查了CHO.
科学领域:
- 运动生理学 运动生理学
- 代谢障碍 代谢障碍 代谢障碍
- 营养科学 营养科学
背景情况:
- 麦克阿德尔病的特点是完全缺少肌肉糖原,导致运动不耐受.
- 与健康个体相比,患者表现出受损的耐力运动能力.
研究的目的:
- 为了确定不同碳水化合物 (CHO) 剂量对麦克阿德尔病患者的运动能力的影响.
- 研究外源葡萄糖水平是否影响麦克阿德尔肌肉细胞中的代谢反应.
主要方法:
- 一项随机,双盲,交叉研究,涉及McArdle患者和健康对照.
- 参与者在服用安慰剂,75克CHO或150克CHO (葡萄糖:果糖=2:1) 后进行了运动测试.
- 试验室研究评估了不同葡萄糖度的肌管中的葡萄糖吸收和乳酸.
主要成果:
- 摄入CHO改善了血糖和乳酸盐水平,减少了脂肪氧化,并减轻了患者的"第二风"现象.
- 更高的CHO剂量显著增加了通风门和峰值输出功率.
- 在体外 (in vitro),麦克阿德尔神经管表现出对葡萄糖的剂量依赖反应,与野生型神经管不同.
结论:
- 碳水化合物摄入对麦克阿德尔病的运动能力产生有益影响.
- 在患有麦克阿德尔病的患者中,CHO对运动能力的积极影响取决于剂量.
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