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不同运动饮料成分对耐力表现和基质氧化的影响:一项随机,双盲,安慰剂控制的交叉研究,对训练有素的运动员进行
Sascha Ketelhut1, Martin Moehle2, Laura Hottenrott3
1University of Bern, Institute of Sport Science, Bern, Switzerland.
概括
这项研究发现,与安慰剂相比,典型的运动饮料成分,包括乳糖,甜菜提取物,氨酸和L-氨酸,并没有改善耐力运动表现. 在运动前食用这些配方对普通水没有显著的优势.
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:
- 运动员通常会为了耐力运动而饮用运动饮料.
- 体育饮料的个别成分提供已知的好处.
- 典型体育饮料配方对表现的综合影响尚不清楚.
研究的目的:
- 评估常见体育饮料成分对耐力表现的影响.
- 评估对感知劳动和基质代谢 (碳水化合物和脂肪) 的影响.
- 为了研究这些效应,使用顺序添加剂设计.
主要方法:
- 12名健康的耐力运动员 (20-35岁) 参加了一项随机,双盲,安慰剂控制的随机研究.
- 四个300毫升的溶液被使用:安慰剂,乳糖/,乳糖//甜菜,和乳糖//甜菜//L-.
- 参与者完成了40分钟的骑自行车比赛,氧气吸收达到80%的峰值,随后进行了增量测试,直到疲.
主要成果:
- 在任何溶液之间的耗尽时间,功率输出或氧气吸收峰值方面没有观察到显著差异.
- 乳酸,葡萄糖度,心率和通风在运动期间没有显著差异.
- 血糖水平在休息时和热身时有显著差异,但在主运动期间没有显著差异.
结论:
- 测试的运动饮料成分对耐力表现的影响最小,直到自愿疲.
- 运动前食用基于乳糖的溶液,与水相比,没有任何性能优势.
- 额外的成分 (甜菜,氨酸,L-氨酸) 没有提高表现或改变运动期间的新陈代谢.
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