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The dose-dependent effect of caffeine supplementation on performance, reaction time and postural stability in CrossFit – a randomized placebo-controlled crossover trial

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cris.virtual.author-orcid0000-0002-2045-0709
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cris.virtual.author-orcid0000-0002-5041-2981
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cris.virtualsource.author-orcid20ac3fe1-f398-4ef7-ab0b-a6a20460f69f
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cris.virtualsource.author-orcid27a945b5-0dd6-465b-9459-95b0fa8038ea
dc.abstract.enBackground Caffeine (CAF) ingestion improves performance in a broad range of exercise tasks. Nevertheless, the CAF-induced, dose-dependent effect on discipline-specific performance and cognitive functions in CrossFit/High-Intensity Functional Training (HIFT) has not been sufficiently investigated. The aim of this study was to evaluate the effect of acute supplementation of three different doses of CAF and placebo (PLA) on specific performance, reaction time (RTime), postural stability (PStab), heart rate (HR) and perceived exertion (RPE). Methods In a randomized double-blind placebo-controlled crossover design, acute pre-exercise supplementation with CAF (3, 6, or 9 mg/kg body mass (BM)) and PLA in 26 moderately trained CrossFit practitioners was examined. The study protocol involved five separate testing sessions using the Fight Gone Bad test (FGB) as the exercise performance evaluation and biochemical analyses, HR and RPE monitoring, as well as the assessment of RTime and PStab, with regard to CYP1A2 (rs762551) and ADORA2A (rs5751876) single nucleotide polymorphism (SNP). Results Supplementation of 6 mgCAF/kgBM induced clinically noticeable improvements in FGBTotal results, RTime and pre-exercise motor time. Nevertheless, there were no significant differences between any CAF doses and PLA in FGBTotal, HRmax, HRmean, RPE, pre/post-exercise RTime, PStab variables or pyruvate concentrations. Lactate concentration was higher (p < 0.05) before and after exercise in all CAF doses than in PLA. There was no effect of CYP1A2 or ADORA2A SNPs on performance. Conclusions The dose-dependent effect of CAF supplementation appears to be limited to statistically nonsignificant but clinically considered changes on specific performance, RTime, PStab, RPE or HR. However, regarding practical CAF-induced performance implications in CrossFit/HIFT, 6 mgCAF/kgBM may be supposed as the most rational supplementation strategy.
dc.affiliationWydział Nauk o Żywności i Żywieniu
dc.affiliation.instituteKatedra Żywienia Człowieka i Dietetyki
dc.contributor.authorGłówka, Natalia
dc.contributor.authorMalik, Jakub
dc.contributor.authorPodgórski, Tomasz
dc.contributor.authorStemplewski, Rafał
dc.contributor.authorMaciaszek, Janusz
dc.contributor.authorCiążyńska, Julia
dc.contributor.authorZawieja, Emilia E.
dc.contributor.authorChmurzyńska, Agata
dc.contributor.authorNowaczyk, Paulina M.
dc.contributor.authorDurkalec-Michalski, Krzysztof
dc.date.access2025-02-17
dc.date.accessioned2025-02-17T11:13:48Z
dc.date.available2025-02-17T11:13:48Z
dc.date.copyright2024-01-16
dc.date.issued2024
dc.description.bibliographyil., bibliogr.
dc.description.financepublication_act
dc.description.financecost0,00
dc.description.if4,5
dc.description.number1
dc.description.points100
dc.description.versionfinal_published
dc.description.volume21
dc.identifier.doi10.1080/15502783.2023.2301384
dc.identifier.issn1550-2783
dc.identifier.urihttps://sciencerep.up.poznan.pl/handle/item/2488
dc.languageen
dc.pbn.affiliationfood and nutrition technology
dc.relation.ispartofJournal of the International Society of Sports Nutrition
dc.relation.pagesart. 2301384
dc.rightsCC-BY
dc.sciencecloudnosend
dc.subject.encognitive function
dc.subject.energogenic support
dc.subject.enhigh-intensity functional exercise
dc.subject.ensports dietetics
dc.subject.enstability
dc.subject.ensupplementation
dc.titleThe dose-dependent effect of caffeine supplementation on performance, reaction time and postural stability in CrossFit – a randomized placebo-controlled crossover trial
dc.typeJournalArticle
dspace.entity.typePublication
oaire.citation.issue1
oaire.citation.volume21
project.funder.nameZakład Dietetyki SPortowej, Akademia Wychowania Fizycznego w Poznaniu