训练有素的骑自行车者在12小时的运动后恢复期间,摄入10g/kg的碳水化合物可以快速补充肝脏,但不能补充肌肉中的糖原
在PubMed上查看摘要
概括
此摘要是机器生成的。运动后的碳水化合物摄入对于补充肌肉和肝脏糖原至关重要. 虽然充足的碳水化合物摄入会在6小时内迅速恢复肝脏的葡萄糖,但它不会在12小时内完全补充肌肉的葡萄糖储量.
科学领域
- 运动生理学
- 营养生物化学
- 生物医学成像
背景情况
- 运动后适当的碳水化合物摄入对于恢复内源性葡萄糖储存至关重要.
- 虽然肌肉糖原的补充得到了充分的研究,但肝脏糖原的恢复时间不太清楚.
- 了解糖原动力学对于优化运动恢复和表现至关重要.
研究的目的
- 研究运动后肌肉和肝脏糖原补充的时间.
- 为了比较摄入碳水化合物与禁食对糖原回收的影响.
- 评估超高场13C磁共振光谱 (MRS) 的非侵入性糖原测量效果.
主要方法
- 十二名男性骑自行车者进行了消耗葡萄糖的运动.
- 使用超高场13C MRS测量肌肉和肝脏的糖原度,在运动前和运动后,以及恢复后6小时和12小时.
- 在康复期间,参与者要么禁食 (CON),要么摄入10克碳水化合物/体重千克 (CHO).
主要成果
- 运动显著耗尽了肌肉和肝脏的糖原储量.
- 由于没有摄入碳水化合物,糖原水平仍然很低.
- 摄入碳水化合物迅速增加了肝脏的葡萄糖,超过了运动前的水平在6小时内.
- 随着碳水化合物摄入量增加,肌肉糖原在12小时内仍低于运动前的水平.
- 13C MRS测量显示与肌肉糖原的生物化学分析有很强的相关性.
结论
- 摄入糖在运动后6小时内有效地恢复肝糖原.
- 摄入大量的碳水化合物 (10 g/kg体质) 不足以在12小时内完全补充肌肉糖原.
- 超高场13C MRS是一种可靠的非侵入性工具,用于评估肌肉和肝脏的糖原动态.
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