运动前的异醇摄入量会影响耐力运动期间的碳水化合物氧化减少,并在随后的温盖特测试中产生最大功率
Naoko Onuma1,2, Daisuke Shindo1, Eriko Matsuo3
1School of Pharmacy, Nihon University, Funabashi, Chiba, Japan.
BMC sports science, medicine & rehabilitation
|July 24, 2023
概括
摄入异醇 (ISO) 在长时间炼期间维持碳水化合物 (CHO) 的利用,导致与糖 (SUC) 相比,无氧功率输出增加. 这表明ISO可能是耐力运动员的优越燃料来源.
科学领域:
- 运动科学 运动科学 运动科学
- 运动生理学 运动生理学
- 营养生物化学 营养生物化学
背景情况:
- 长时间的耐力运动显著影响碳水化合物 (CHO) 代谢.
- 低血糖指数的碳水化合物异马 (ISO) 与砂糖 (SUC) 不同地影响基质利用.
- 对于运动员来说,了解CHO利用率及其对耐力后无氧性能的影响至关重要.
研究的目的:
- 为了研究长时间耐力运动中ISO或SUC摄入后CHO利用的时间过程.
- 为了确定ISO与SUC对耐力活动后无氧功率输出的影响.
主要方法:
- 13名运动员服用ISO或SUC,休息60分钟,然后进行90分钟的跑步机跑步.
- 使用过期气体分析来估计能源消耗 (EE) 和CHO氧化率.
- 运动后立即进行了30秒的Wingate测试,以评估最大的无氧功率输出.
主要成果:
- 与SUC相比,CHO衍生的EE的百分比在ISO练习期间比SUC更逐渐下降.
- 在ISO条件下 (-13.3%/h),CHO衍生的EE的下降速度明显较在SUC条件下 (-19.4%/h) 慢.
- 在Wingate测试中,ISO摄入 (12.0W/kg) 与SUC摄入 (11.5W/kg) 后,最大无氧输出功率显著更高.
结论:
- 与砂糖 (SUC) 相比,异醇 (ISO) 的摄入导致在长期耐力运动中碳水化合物利用率持续上升.
- 这种持续的CHO可用性与ISO有助于在耐力训练结束时改善无氧功率输出.
- 对于寻求优化耐力表现和无氧能力的运动员来说,ISO可能是一个有益的碳水化合物来源.
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