摄入L-氨酸对精神疲劳的骑自行车者的耐力表现的影响
Luiz José Frota Solon-Júnior1,2,3, Daniel Boullosa4,5,6, Cesar Verçosa Dias1
1Federal University of Paraíba, Joao Pessoa, Paraíba, Brazil.
European journal of sport science
|March 12, 2026
概括
氨酸补充剂在精神疲劳的骑自行车者中提高了16%的耐力表现. 这种氨基酸可能有助于减少强度运动期间感知到的劳累,有利于面临精神疲劳的运动员.
科学领域:
- 运动科学 运动科学 运动科学
- 营养生物化学 营养生物化学
- 运动生理学 运动生理学
背景情况:
- 精神疲劳会影响耐力表现.
- 氨酸是神经递质的氨基酸前体,可以减轻疲劳.
- 对于运动员来说,了解L-氨酸对精神疲劳下的表现的影响至关重要.
研究的目的:
- 研究L-氨酸补充剂对精神疲劳的骑自行车者的耐力表现的影响.
- 评估生理反应,包括氧气消耗,心率和感知劳力的评分,在骑自行车到疲劳期间.
主要方法:
- 十二名休骑自行车者经历了两次恒定工作负载骑自行车测试,以达到最大耐力功率输出功率的80%的疲劳.
- 在每次测试之前,使用60分钟的Stroop任务诱导精神疲劳.
- 参与者在精神疲劳条件下接受L-tyrosine (300 mg/kg) 或安慰剂.
主要成果:
- 与安慰剂 (398.7s) (p=0.008) 相比,L-氨酸补充剂 (459.9s) 的耗尽时间明显更长 (p=0.008).
- 在自行车测试期间感知劳力的评分增加较低,与L-tyrosine (0.560 a.u.) 与安慰剂 (0.673 a.u.) 相比 (p=0.03) 的情况.
- 条件之间在氧气消耗或心率上没有发现显著差异.
结论:
- 在经历精神疲劳的骑自行车者中,L-氨酸补充剂可提高约16%的耐力表现.
- 性能提升与运动期间感知到的炼率降低有关.
- 对于精神疲劳的运动员来说,L-tyrosine可能会提供适度的性能益处,这需要在更大样本尺寸下进行进一步的研究.
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