一剂甜菜汁不会在间隔游泳运动中提高表现
Berta Moreno-Heredero1,2, Esther Morencos1, Jorge E Morais3,4
1Exercise Physiology Group, Exercise and Sport Sciences, Faculty of Health Sciences, Universidad Francisco de Vitoria, Madrid, Spain.
Journal of sports science & medicine
|March 8, 2024
概括
甜菜汁 (BJ) 补充剂在高强度间歇运动期间在竞技游泳者中没有显著改善游泳表现或生理标记. 然而,在最后的重复中,BJ可能会在运动耐受性方面提供轻微的好处.
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:
- 甜菜汁 (BJ) 以其高酸盐含量而闻名,可转化为氧化 (NO).
- 氧化在血管扩张和线粒体效率方面发挥作用,可能会影响运动表现.
- 补充BJ对高强度间歇性运动,特别是游泳的影响仍然不清楚.
研究的目的:
- 调查甜菜汁补充剂对游泳表现的急性影响.
- 评估BJ在高强度间歇运动期间对无氧代谢的生理变量的影响.
- 评估BJ摄入后竞技游泳运动员在运动和恢复方面的主观措施.
主要方法:
- 一项随机,双盲,安慰剂控制的交叉研究,涉及18名竞技游泳运动员.
- 游泳者在运动前3小时服用了甜菜汁 (6.4毫摩尔NO3-) 或安慰剂 (0.04毫摩尔NO3-).
- 性能在2x6x100米最大力度游泳试验中进行了评估,休息间隔很短.
主要成果:
- 在甜菜汁和安慰剂条件之间,整体100米游泳时间没有显著差异.
- 在BJ组中观察到第二块最后一次重复的统计学上显著的改善.
- 乳酸度,感知劳动力 (RPE) 和总质量恢复 (TQR) 在条件之间没有显著差异,尽管TQR在BJ后的重复中更高.
结论:
- 一次剂量的甜菜汁并没有提高间歇性游泳表现,也没有改变关键的生理和主观变量.
- 在强烈的游泳组结束时,甜菜汁对运动耐受性有潜在的,尽管很小的积极影响.
- 可能需要进一步的研究来确定最佳的剂量和时间,以确定游泳者的人体效应.
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