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The Effects of Acute Caffeine Supplementation on Performance in Trained CrossFit Athletes

机译：补充咖啡因对训练有素的CrossFit运动员运动成绩的影响

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Caffeine’s ergogenic effects persist during various exercise modalities; however, information establishing its efficacy during CrossFit protocols is limited. Our study aimed to determine the effects of caffeine supplementation on CrossFit performance. Thirteen CrossFit-trained men (age = 28.5 ± 6.6 years, experience = 49.2 ± 36.3 months) were randomized in a double-blind, crossover design. Participants completed two sessions separated by a seven-day washout period, 60 min after consuming 5 mg/kg body mass of caffeine or a placebo. In each session, participants completed as many rounds as possible in 20 min of 5 pull-ups, 10 push-ups, and 15 air squats. CrossFit performance was the total number of repetitions completed in 20 min. Paired samples t-tests were used to compare CrossFit performance between caffeine and placebo conditions and to test for a potential learning effect between the first and second sessions. CrossFit performance was significantly higher during the caffeine condition compared to the placebo (461.4 ± 103 vs. 425.0 ± 93.5 repetitions, p 0.05). No significant learning effect was identified between the first and second sessions (445.6 ± 95.0 vs. 440.8 ± 105.0 repetitions, p = 0.73) nor was there a significant treatment order effect ( p = 0.40). Caffeine’s ergogenic effect is present during CrossFit; however, future investigations should establish caffeine’s efficacy during other CrossFit protocols and among female athletes.
机译：咖啡因的人体工程学作用在各种运动方式中持续存在。但是，在CrossFit协议期间确定其功效的信息有限。我们的研究旨在确定补充咖啡因对CrossFit性能的影响。 13名经过CrossFit训练的男性（年龄= 28.5±6.6岁，经验= 49.2±36.3个月）以双盲，交叉设计随机分配。参与者在服用5 mg / kg体重的咖啡因或安慰剂后60分钟，完成了为期7天的洗脱期，分两次进行。在每节课中，参与者在20分钟内完成尽可能多的回合，包括5个上拉，10个俯卧撑和15个深蹲。 CrossFit表现是20分钟内完成的重复总数。配对样本t检验用于比较咖啡因和安慰剂条件之间的CrossFit表现，并测试第一和第二阶段之间的潜在学习效果。与安慰剂相比，咖啡因条件下的CrossFit性能显着更高（461.4±103与425.0±93.5重复，p <0.05）。在第一和第二节之间没有发现明显的学习效果（445.6±95.0 vs. 440.8±105.0重复，p = 0.73），也没有显着的治疗顺序效果（p = 0.40）。咖啡因的人体工程学作用存在于CrossFit中。但是，未来的调查应该确定咖啡因在其他CrossFit协议中以及女运动员中的功效。

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