咖啡因,乳酸或什么都不是:在上肢肌肉耐力任务中,期望对男性的表现和感知到的劳动有什么影响?
Dara Campelo1, Alexander J Koch2, Marco Machado1,3
1Laboratory of Physiology and Biokinetic, Faculty of Biological Sciences and Health, Itaperuna, Brazil.
International journal of health sciences
|November 6, 2023
概括
相信某种物质的作用显著影响肌肉耐力. 当参与者认为他们服用咖啡因与安慰剂或乳酸相比时,他们进行了更多的重复,并报告了较低的感知炼.
科学领域:
- 运动生理学 运动生理学
- 运动科学 运动科学 运动科学
- 运动心理学 运动心理学
背景情况:
- 假药效应在医学上得到了充分的证据,但它对运动表现的影响需要进一步研究.
- 了解影响肌肉耐力的心理因素可以为训练和补充策略提供信息.
研究的目的:
- 研究一种被摄入物质的ergogenic (增强性能) 或ergolytic (降低性能) 属性的信念如何影响肌肉耐力和感知到的炼.
- 为了比较感知咖啡因,乳酸和中性安慰剂对板压力表现的影响.
主要方法:
- 训练有素的男性 (n=15) 进行了长椅压力,达到其一次重复最大的80%的失败.
- 参与者摄入了相同的惰性囊,但被告知它们含有咖啡因 (安慰剂),乳酸 (nocebo),或是中性 (控制).
- 完成的重复和感知劳动力 (RPE) 评级被记录并使用统计测试进行分析.
主要成果:
- 与对照组 (10.3 ± 2.9) 和Nocebo (7.5 ± 2.6) 相比,在安慰剂条件下 (14.1 ± 3.0) 完成的重复次数显著更多.
- 感知劳动在安慰剂条件下较低,而不是控制和nocebo,在控制和nocebo中较低.
- 在安慰剂和nocebo条件下执行的重复之间观察到负相关性.
结论:
- 相信某种物质的 ergogenic 或 ergolytic 特性可以显著改变受过训练的个体的肌肉耐力表现和感知力的努力.
- 对物质效应的心理预期在物理输出中起着可衡量的作用,独立于物质的实际生理影响.
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