与双源碳水化合物同时摄入乳清蛋白可提高氨基酸的可用性,而不会影响运动后肝脏糖原复合
Sophie C Hannon1, James McStravick1, Libby Henthorn1
1Institute of Sport, Department of Sports & Exercise Science, Manchester Metropolitan University, Manchester, UK.
The Journal of physiology
|July 9, 2025
概括
同时摄入乳清蛋白与麦芽素和果糖混合物可以提高氨基酸的可用性,而不会阻碍运动后肝脏糖原复合. 这种双源碳水化合物策略支持耐力运动员的肌肉重塑和快速补充糖原.
科学领域:
- 运动生理学 运动生理学
- 营养生物化学 营养生物化学
- 运动科学 运动科学 运动科学
背景情况:
- 耐力运动员经常在运动后结合碳水化合物和蛋白质,以优化恢复.
- 了解不同碳水化合物来源和蛋白质共同摄入对糖原复合的影响对于性能至关重要.
- 乳清蛋白是用于肌肉修复和恢复的常见补充剂.
研究的目的:
- 为了研究摄入马尔托德和/或果糖 (含或不含乳清蛋白) 对运动后肝脏和肌肉糖原复合的作用.
- 为了比较不同碳水化合物配方 (马尔托德克斯特林,果糖,马尔托德克斯特林+果糖混合物) 与乳清蛋白在恢复标记上的疗效.
- 在康复期间评估激素反应 (胰岛素,葡萄糖) 和基质可用性.
主要方法:
- 十名训练有素的男性骑自行车者完成了消耗糖原的运动.
- 参与者在5小时内摄入60g/h的碳水化合物,这些碳水化合物来自马尔托德素 (MAL),果糖 (FRU),1:1的马尔托德素+果糖混合物 (MF) 或MF加30g的乳清蛋白 (PRO).
- 使用13C磁共振光谱和成像测量肝脏和肌肉糖原度.
主要成果:
- 与MAL相比,在FRU,MF和PRO治疗5小时后,肝脏糖原度显着更高.
- 肌肉糖原度在任何试验之间都没有显著差异.
- 与FRU和MF相比,蛋白质联合摄入 (PRO) 导致血清胰岛素和血葡萄糖的增加.
结论:
- 同时摄入乳清蛋白与1:1的麦芽素和果糖混合物不会损害运动后肝脏糖原复合.
- 这一策略增强了氨基酸的可用性,为肌肉重塑提供了基质,并有效补充了糖原.
- 双源碳水化合物 (马尔托德克斯+果糖) 与乳清蛋白是寻求优化恢复的运动员的实用方法.
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