急性单补充剂在受过训练的个体中,在增量循环期间不会改变运动效率
Jack Bone1, Sydney Baumgarten1, Devin G McCarthy1
1Department of Kinesiology, McMaster University, Hamilton, Ontario, CANADA.
摄入乙烯 (KE) 不会提高炼效率,但会增加心肺呼吸应激. 高剂量的KE也减少了在增量循环运动期间的峰值功率输出 (PPO).
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:
- 酸乙烯 (KE) 是对潜在的 ergogenic 效应进行研究的外源酸.
- 了解KE对运动表现和生理反应的影响至关重要.
研究的目的:
- 研究不同剂量的KE对运动经济,效率和心肺呼吸反应的影响.
- 为了确定KE补充是否会影响增量运动期间的峰值功率输出 (PPO).
主要方法:
- 28名健康成年人完成了一项随机,双盲,交叉试验.
- 参与者在增量自行车运动之前摄入了0.3g/kg (KE-LO) 或0.6g/kg (KE-HI) KE,或安慰剂 (PLAC).
- 测量包括血水平,运动经济,效率,心率,通风和峰值功率输出 (PPO).
主要成果:
- 与安慰剂相比,KE摄入后血液β-基酸盐水平显著升高.
- 在条件之间没有观察到运动经济,总效率或三角形效率的差异.
- 与PLAC相比,摄入KE (KE-HI和KE-LO) 的心率和通风率更高.
- 与KE-LO和PLAC相比,KE-HI条件下峰值功率输出 (PPO) 降低了.
结论:
- 摄入KE并不能提高健康成年人的运动效率.
- 摄入KE补充剂会增加在次最大运动期间心肺呼吸系统的压力.
- 较高剂量的KE可能会损害最大运动能力,如减少PPO所示.
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