Caffeine Supplementation Improves Anaerobic Performance and Neuromuscular Efficiency and Fatigue in Olympic-Level Boxers

Juan, Alejandro F. San; López-Samanés, Álvaro; Jiménez, Pablo Jodrá; Rueda, Javier; Veiga-Herreros, Pablo; Pérez-López, Alberto; Domínguez, Raúl

doi:10.3390/nu11092120

Cited by 47 publications

(48 citation statements)

References 62 publications

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“…The purpose of this investigation was to determine the effects of acute caffeine supplementation on CrossFit ® performance and perceptual responses to exercise in CrossFit ® -trained men. Because of the well-documented ergogenic effects of caffeine that are likely due to central mechanisms [2,3,5,42], it was hypothesized that caffeine supplementation would improve CrossFit ® performance. The hypothesis was not supported, as no significant improvement in CrossFit ® performance or perceptual responses was found after caffeine supplementation.…”

Section: Discussionmentioning

confidence: 99%

Acute Caffeine Supplementation Does Not Improve Performance in Trained CrossFit® Athletes

Stein

Ramirez

Heinrich

2020

Sports

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Caffeine's ergogenic effects persist during various exercise modalities; however, information establishing its efficacy during CrossFit ® protocols is limited. This study aimed to determine the effects of caffeine supplementation on CrossFit ® performance. Twenty CrossFit ® -trained men (age = 26.7 ± 6.2 years, experience = 3.7 ± 2.9 years) 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 five 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 not significantly different during the caffeine condition compared to the placebo (468.6 ± 114.7 vs. 466.7 ± 94.3 repetitions, p = 0.861). A significant learning effect was identified between the first and second sessions (452.4 ± 101 vs. 483.8 ± 106.5 repetitions, p = 0.001), with no significant effect of treatment order (p = 0.438). Caffeine's ergogenic effect were not present during the CrossFit ® workout "Cindy"; however, future research should include familiarization sessions and examine other CrossFit ® workouts in novice and women participants.

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Section: Discussionmentioning

confidence: 99%

Acute Caffeine Supplementation Does Not Improve Performance in Trained CrossFit® Athletes

Stein

Ramirez

Heinrich

2020

Sports

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“…Numerous studies have shown the effectiveness of caffeine supplementation on sports performance in which aerobic [1], anaerobic [2,3,4] or mixed [5,6,7] metabolism is prioritized. Current guidelines recommend the ingestion of low-to-moderate doses of caffeine, ranging from 3 to 6 mg/kg, approximately 60 min prior to exercise to get these improvements [8,9].…”

Section: Introductionmentioning

confidence: 99%

Effect of Caffeine Supplementation on Sports Performance Based on Differences Between Sexes: A Systematic Review

et al. 2019

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Most studies that have shown the positive effects of caffeine supplementation on sports performance have been carried out on men. However, the differences between sexes are evident in terms of body size, body composition, and hormonal functioning, which might cause different outcomes on performance for the same dosage of caffeine intake in men vs. women. The main aim of this systematic review was to analyze and compare the effects of caffeine intake between men and women on sports performance to provide a source of knowledge to sports practitioners and coaches, especially for those working with women athletes, on the use of caffeine as an ergogenic aid. A structured search was carried out following the Preferred Reporting Items for Systematic Review and Meta-Analyses (PRISMA) guidelines in the Web of Science, Cochrane Library, and Scopus databases until 28 July 2019. The search included studies in which the effects of caffeine supplementation on athletic performance were compared between sexes and to an identical placebo situation (dose, duration and timing). No filters were applied for participants’ physical fitness level or age. A total of 254 articles were obtained in the initial search. When applying the inclusion and exclusion criteria, the final sample was 10 articles. The systematic review concluded that four investigations (100% of the number of investigations on this topic) had not found differences between sexes in terms of caffeine supplementation on aerobic performance and 3/3 (100%) on the fatigue index. However, four out of seven articles (57.1%) showed that the ergogenicity of caffeine for anaerobic performance was higher in men than women. In particular, it seems that men are able to produce more power, greater total weight lifted and more speed with the same dose of caffeine than women. In summary, caffeine supplementation produced a similar ergogenic benefit for aerobic performance and the fatigue index in men and women athletes. Nevertheless, the effects of caffeine to produce more power, total weight lifted and to improve sprint performance with respect to a placebo was higher in men than women athletes despite the same dose of caffeine being administered. Thus, the ergogenic effect of acute caffeine intake on anaerobic performance might be higher in men than in women.

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“…Of note, examining the effect of caffeine supplementation on repeated bouts of Wingate tests (four 30-s Wingate tests with 4 min of rest between each exercise) after caffeine (6 mg∙kg − 1 ) or placebo ingestion, Greer, McLean, and Graham (1998) observed that caffeine ingestion had an ergolytic effect in the latter two exercise bouts [ 48 ]. Otherwise, it was recently reported that caffeine supplementation (6 mg∙kg − 1 ) increased the peak power during Wingate anaerobic test and diminished neuromuscular fatigue, shown by attenuation of decrease in countermovement jump performance after Wingate test [ 55 ] . Thus, since increase [ 55 , 56 ] and reduction [ 48 , 57 ] of different markers of exercise tolerance after caffeine supplementation already been reported, the recommendation of caffeine supplementation to improve recreational or athletic performance should be made cautiously.…”

Section: Discussionmentioning

confidence: 99%

“…Otherwise, it was recently reported that caffeine supplementation (6 mg∙kg − 1 ) increased the peak power during Wingate anaerobic test and diminished neuromuscular fatigue, shown by attenuation of decrease in countermovement jump performance after Wingate test [ 55 ] . Thus, since increase [ 55 , 56 ] and reduction [ 48 , 57 ] of different markers of exercise tolerance after caffeine supplementation already been reported, the recommendation of caffeine supplementation to improve recreational or athletic performance should be made cautiously.…”

Section: Discussionmentioning

confidence: 99%

The effects of varying doses of caffeine on cardiac parasympathetic reactivation following an acute bout of anaerobic exercise in recreational athletes

Sarshin

Naderi

Cruz

et al. 2020

Journal of the International Society of Sports Nutrition

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Background: To examine the effects of varying doses of caffeine on autonomic reactivation following anaerobic exercise. Methods: Recreationally active males (N = 20; 24 ± 2y) participated in a randomized, double-blind, placebocontrolled, crossover study where participants ingested: [1] Control (CON; no supplement), [2] a non-caffeinated placebo (PLA), [3] 3-mg•kg − 1 of caffeine (CAF3) or [4] 6-mg•kg − 1 of caffeine (CAF6) prior to Wingate testing. Parasympathetic (lnRMSSD, primary outcome) and global HRV (lnSDNN, secondary outcome) were assessed at rest (i.e., pre-ingestion), 45-min post-ingestion, and 5-min and 35-min post-exercise recovery. We used a GLM to assess mean (95% CI) changes from pre-ingestion baseline. Results: Overall, we observed a significant trend for lnRMSSD and lnSDNN (both, p = 0.001, ηp 2 = 0.745). Forty-five minutes after treatment ingestion, we observed a significant increase in lnRMSSD for CAF3 (0.15 ms, 95%CI, 0.07, 0.24) and CAF6 (0.16 ms, 95%CI, 0.06,0.25), both being significant (both, p < 0.004) vs. CON (− 0.02 ms, 95%CI, − 0.09, 0.04). Five-minutes after exercise, all treatments demonstrated significant declines in lnRMSSD vs. baseline (all, p < 0.001). After 35-min of recovery, lnRMSSD returned to a level not significantly different than baseline for CAF3 (0.03 ms, 95%CI, − 0.05, 0.12) and CAF6 (− 0.03 ms, 95%CI, − 0.17, 0.10), while PLA (− 0.16 ms, 95%CI, − 0.25, − 0.06) and CON (− 0.17 ms, 95%CI, − 0.28, − 0.07) treatments remained significantly depressed. A similar pattern was also observed for SDNN. Conclusion: Caffeine ingestion increases resting cardiac autonomic modulation and accelerates post-exercise autonomic recovery after a bout of anaerobic exercise in recreationally active young men. However, no differences between caffeine doses on cardiac autonomic reactivity were observed.

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Caffeine Supplementation Improves Anaerobic Performance and Neuromuscular Efficiency and Fatigue in Olympic-Level Boxers

Cited by 47 publications

References 62 publications

Acute Caffeine Supplementation Does Not Improve Performance in Trained CrossFit® Athletes

Acute Caffeine Supplementation Does Not Improve Performance in Trained CrossFit® Athletes

Effect of Caffeine Supplementation on Sports Performance Based on Differences Between Sexes: A Systematic Review

The effects of varying doses of caffeine on cardiac parasympathetic reactivation following an acute bout of anaerobic exercise in recreational athletes

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