咖啡因预期不会影响疲劳值的身体工作能力
Christina A Ambrozy1,2, Nicole E Hawes1,2, Olivia L Hayden1,2
1Physical Therapy Program, Department of Health Care Sciences, College of Pharmacy and Health Sciences, Wayne State University, Detroit, Michigan; and.
Journal of strength and conditioning research
|May 23, 2024
概括
咖啡因预期不会影响疲劳值的身体工作能力. 然而,当个人认为他们接受了咖啡因时,它提高了表现,这表明期望在人体工程学辅助效应中起着作用.
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
- 营养科学 营养科学
背景情况:
- 由期望驱动的安慰剂效应,即使没有活性成分,也可以影响结果.
- 虽然咖啡因的性能益处是众所周知的,但其对预期影响的神经肌肉疲劳的影响不太清楚.
- 疲劳值 (PWCFT) 的体力工作能力提供了对神经肌肉疲劳的非侵入性测量.
研究的目的:
- 调查咖啡因预期是否影响疲劳值 (PWCFT) 的身体工作能力.
- 为了确定咖啡因摄入量与实际咖啡因摄入量对神经肌肉疲劳的影响.
- 探索期望在咖啡因人体营养效应中的作用.
主要方法:
- 八名健康的大学年龄的男性参加了四次实验室会议,每次分隔一周.
- 参与者被随机分配到四种条件之一:被告知咖啡因/接受咖啡因,被告知安慰剂/接受安慰剂,被告知咖啡因/接受安慰剂,被告知安慰剂/接受咖啡因.
- 摄入后,参与者休息了一个小时,然后完成增量运动测试,通过表面电肌图评估PWCFT.
主要成果:
- 与安慰剂条件相比,当参与者被告知他们服用咖啡因并且实际服用咖啡因时,最大功率输出,PWCFT,PWCFT作为最大功率输出的百分比,以及运动结束时的心率显著更高.
- 当参与者被告知他们接受安慰剂,但实际上摄入咖啡因时,没有观察到表现的显著差异.
- 这些发现表明,人们对咖啡因消费的信念,以及实际消费,显著影响绩效指标.
结论:
- 咖啡因预期寿命本身似乎不会改变疲劳值的身体工作能力.
- 消费咖啡因的信念,加上实际摄入量,可以提高运动表现和能力.
- 期望和相关的生理反应可能成为人体辅助剂和安慰剂效应的关键调解者.
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