The Effects of Acute Caffeine Supplementation on Performance in Trained CrossFit Athletes
AbstractCaffeine’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. View Full-Text
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Stein, J.A.; Ramirez, M.; Heinrich, K.M. The Effects of Acute Caffeine Supplementation on Performance in Trained CrossFit Athletes. Sports 2019, 7, 95.
Stein JA, Ramirez M, Heinrich KM. The Effects of Acute Caffeine Supplementation on Performance in Trained CrossFit Athletes. Sports. 2019; 7(4):95.Chicago/Turabian Style
Stein, Jesse A.; Ramirez, Melitza; Heinrich, Katie M. 2019. "The Effects of Acute Caffeine Supplementation on Performance in Trained CrossFit Athletes." Sports 7, no. 4: 95.
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