咖啡因和抵抗运动对抵抗训练女性脉冲波反射的影响
Sarah G Kearney1, Therese M Smith2, Meredith C Paskert Joplin3
1Exercise Science, Grand Valley State University, Allendale, MI, USA.
International journal of exercise science
|December 10, 2025
概括
咖啡因补充剂没有改变抵抗训练妇女的脉冲波反射 (PWR). 然而,仅仅抵抗运动就显著影响了PWR测量,这表明运动是这些变化的主要驱动因素.
科学领域:
- 心血管生理学心血管生理学
- 运动生理学 运动生理学
- 营养生物化学 营养生物化学
背景情况:
- 众所周知,咖啡因会影响脉冲波反射 (PWR),但研究主要集中在男性人群中.
- 了解咖啡因对女性PWR的影响,特别是与抵抗运动 (RE) 相结合,对于全面的心血管健康见解至关重要.
研究的目的:
- 研究咖啡因对年轻,健康,经过抵抗训练的女性PWR的影响.
- 为了确定咖啡因是否会在休息期间和急性抵抗运动 (RE) 后改变PWR反应.
主要方法:
- 11名经过抵抗训练的女性参加了一项双盲,安慰剂控制的研究.
- 参与者在完成急性RE (腰和长椅压力到失败) 之前,要么摄入咖啡因 (4mg/kg),要么服用安慰剂.
- 在休息时评估PWR措施,摄入后50分钟,立即RE后,RE后10分钟.
主要成果:
- 在咖啡因和安慰剂条件之间在任何时间点都没有观察到PWR测量的显著差异.
- 一次急性RE发作显著增加了大动脉脉压 (APP),增压 (AP),增压指数 (AIx),AIx在75bpm (AIx@75),静脉压时间指数 (SPTI) 和左心室浪费能量 (ΔEw) 的正常化 (p <0.01).
- 腹腔压力时间指数 (DPTI) 在RE后显著下降 (p < 0.01),而大动脉静脉血压 (ASBP),大动脉腹腔血压 (ADBP),反射波的时间 (Tr) 和心下活力比率 (SEVR) 保持不变.
结论:
- 咖啡因4mg/kg剂量似乎不会改变抵抗训练女性的脉冲波反射 (PWR) 测量,除了抵抗运动本身的影响.
- 急性抵抗运动在这个人群中显著影响各种PWR参数.
- 可能需要进一步的研究来探索不同的咖啡因剂量或人群.
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