运动中的咖啡因在不加剧高通风和大脑低输液的情况下改善了炎热的运动表现.
Akira Katagiri1, Rikuto Otsuka1, Takeshi Nishiyasu
1Institute of Health and Sport Sciences, University of Tsukuba, Tsukuba City, Ibaraki, JAPAN.
Medicine and science in sports and exercise
|June 23, 2025
概括
在炎热的环境中长时间炼时摄入咖啡因可以提高耐力表现. 这种策略可以改善晚期循环的持续时间,而不会对体温或脑血流产生负面影响.
科学领域:
- 运动生理学 运动生理学
- 营养科学 营养科学
- 环境生理学环境生理学
背景情况:
- 运动前的咖啡因可以提高耐力,但热量可能会由于增加的生理应变而抵消这种效果.
- 炎热的高咖啡因水平会导致高热度,高通风和大脑低 perfusion.
- 在运动中摄入咖啡因会延迟血液咖啡因的升高,从而可能减轻热量的负面影响.
研究的目的:
- 测试运动中的咖啡因是否能改善长时间在高温运动中的表现.
- 为了评估咖啡因对呼吸道和大脑血流反应在运动中的热量的影响.
- 为了评估咖啡因在热应激运动期间对体温的影响.
主要方法:
- 12名健康成年人在35°C的温度下完成了自行车测试.
- 在交叉设计中,参与者在中等强度运动期间摄入咖啡因 (5 mg/kg) 或安慰剂.
- 性能是通过高强度自行车运动中耗尽的时间来衡量.
主要成果:
- 在运动中摄入咖啡因导致更长的高强度骑自行车时间 (218比165秒).
- 在中度运动期间,咖啡因的感知力度较低.
- 在咖啡因和安慰剂试验中,每分钟通风,脑血流和食道温度保持相似.
结论:
- 在运动中摄入咖啡因可以改善热的晚期运动表现.
- 这种人体效应发生在不加剧高热,高通风或大脑低 perfusion 的情况下.
- 在运动期间定时摄入咖啡因是一种可行的热性能策略.
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