Kinesiology, State University of New York at Cortland, Cortland, NY, 13045, USA.
Exercise Science, Walsh University, North Canton, OH, 44720, USA.
Eur J Appl Physiol. 2023 Dec;123(12):2711-2721. doi: 10.1007/s00421-023-05260-x. Epub 2023 Jun 21.
Both an acute bout of resistance exercise (RE) and caffeine consumption can significantly alter hemodynamics, autonomic modulation, and arterial stiffness, which may correlate with adverse cardiovascular events. However, effects of an acute bout of RE and caffeine are unclear in resistance-trained women.
The purpose of this study was to compare the effects of an acute bout of RE with repetitions to failure on squat and bench press, with or without caffeine, on performance, resting and recovery measures of hemodynamics, autonomic modulation, as well as arterial stiffness in resistance-trained women.
Eleven women participated in a double-blind, placebo controlled cross-over design in which they consumed caffeine (4 mg/kg) or placebo at least 72 h apart. Sixty minutes following ingestion, participants performed two sets of 10 repetitions followed by a third set to failure on squat and bench press. Hemodynamics, autonomic modulation, and arterial stiffness were measured at rest, 60 min post-ingestion, and three minutes and 10 min following RE.
Data demonstrated caffeine has no additive effects on performance, hemodynamics, autonomic modulation, or arterial stiffness (p > 0.05) before or following an acute bout of RE in resistance-trained women compared to a placebo.
Resistance-trained women may not observe any alteration to RE performance on the squat and bench press in terms of repetitions to failure following caffeine ingestion. In addition, the data from the present study suggests that there may also not be any further negative effects on the cardiovasculature if caffeine is consumed prior to the RE bout.
单次抗阻运动（RE）和咖啡因摄入均可显著改变血液动力学、自主神经调节和动脉僵硬度，这可能与不良心血管事件相关。然而，在抗阻训练女性中，单次 RE 及咖啡因的作用尚不清楚。
本研究旨在比较在抗阻训练女性中，咖啡因（4mg/kg）或安慰剂摄入至少 72 小时后，一次急性 RE （重复至力竭的深蹲和卧推）及其与咖啡因联合应用对运动表现、静息和恢复期间血液动力学、自主神经调节以及动脉僵硬度的影响。
11 名女性参与了一项双盲、安慰剂对照交叉设计研究，她们在至少 72 小时的间隔内分别摄入咖啡因（4mg/kg）或安慰剂。摄入后 60 分钟，参与者进行两组 10 次重复，然后在深蹲和卧推上进行第三组至力竭。在静息时、摄入后 60 分钟以及 RE 后 3 分钟和 10 分钟测量血液动力学、自主神经调节和动脉僵硬度。
与安慰剂相比，咖啡因在抗阻训练女性急性 RE 前后对运动表现、血液动力学、自主神经调节或动脉僵硬度（p>0.05）无附加作用。
抗阻训练女性在摄入咖啡因后，深蹲和卧推重复至力竭的 RE 性能可能不会发生任何变化。此外，本研究的数据表明，如果在 RE 之前摄入咖啡因，可能不会对心血管系统产生任何进一步的负面影响。
