Filip-Stachnik Aleksandra, Krzysztofik Michal, Del Coso Juan, Wilk Michal
Institute of Sport Sciences, Jerzy Kukuczka Academy of Physical Education, 40-065 Katowice, Poland.
Exercise Physiology Laboratory, Universidad Rey Juan Carlos, 28942 Fuenlabrada, Spain.
J Clin Med. 2021 Sep 25;10(19):4380. doi: 10.3390/jcm10194380.
Chronic intake of caffeine may produce a reduction in the potential performance benefits obtained with the acute intake of this substance. For this reason, athletes habituated to caffeine often use high doses of caffeine (≥9 mg/kg) to overcome tolerance to caffeine ergogenicity due to chronic intake. The main objective of the current investigation was to evaluate the effects of high caffeine doses on bar velocity during an explosive bench press throw in athletes habituated to caffeine. Twelve resistance-trained athletes, with a moderate-to-high chronic intake of caffeine (~5.3 mg/kg/day) participated in a randomized double-blind and randomized experimental design. Each participant performed three identical experimental sessions 60 min after the intake of a placebo (PLAC) or after the intake of 9 (CAF-9) or 12 mg/kg (CAF-12) of caffeine. In each experimental session, the athletes performed five sets of two repetitions of the bench press throw exercise with a load equivalent to 30% of their one-repetition maximum. In comparison to PLAC, the intake of caffeine increased peak and mean velocity ( < 0.01) during the five sets of the bench press throw exercise. There were no significant differences in peak and mean bar velocity between the two doses of caffeine (CAF-9 vs. CAF-12; = 0.91, = 0.96, respectively). The ingestion of high doses of caffeine was effective in producing an increase in mean and peak bar velocity during the bench press throw in a group of habitual caffeine users. However, using CAF-12 did not offer additional benefits for performance with respect to CAF-9.
长期摄入咖啡因可能会降低急性摄入该物质所带来的潜在性能提升效果。因此，习惯饮用咖啡因的运动员常使用高剂量咖啡因（≥9毫克/千克）来克服因长期摄入导致的对咖啡因增强体能作用的耐受性。本研究的主要目的是评估高剂量咖啡因对习惯饮用咖啡因的运动员在爆发性卧推投掷过程中杠铃速度的影响。12名进行抗阻训练、长期中度至高度摄入咖啡因（约5.3毫克/千克/天）的运动员参与了一项随机双盲随机实验设计。每位参与者在摄入安慰剂（PLAC）或9（CAF - 9）或12毫克/千克（CAF - 12）咖啡因60分钟后进行三个相同的实验环节。在每个实验环节中，运动员以相当于其一次最大重复量30%的负荷进行五组，每组两次的卧推投掷练习。与PLAC相比，摄入咖啡因后在五组卧推投掷练习中提高了峰值和平均速度（<0.01）。两种咖啡因剂量（CAF - 9与CAF - 12）之间的峰值和平均杠铃速度无显著差异（分别为=0.91，=0.96）。在一组习惯饮用咖啡因的使用者中，摄入高剂量咖啡因可有效提高卧推投掷过程中的平均和峰值杠铃速度。然而，与CAF - 9相比，使用CAF - 12在性能方面并未带来额外益处。
