Creatine supplementation improves phosphagen energy pathway during supramaximal effort, but does not improve anaerobic capacity or performance

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dc.contributor.authorDe Araujo Bonetti De Poli, Rodrigo [UNESP]
dc.contributor.authorRoncada, Luan Henrique [UNESP]
dc.contributor.authorDe Souza Malta, Elvis [UNESP]
dc.contributor.authorArtioli, Guilherme Giannini
dc.contributor.authorBertuzzi, Rômulo
dc.contributor.authorZagatto, Alessandro Moura [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.date.accessioned2019-10-06T15:48:21Z
dc.date.available2019-10-06T15:48:21Z
dc.date.issued2019-01-01
dc.description.abstractThis study aimed to investigate the effects of short-duration creatine monohydrate supplementation on anaerobic capacity (AC), anaerobic energy pathways, and time-to-exhaustion during high-intensity running. Fourteen healthy men underwent a graded exercise test (GXT) followed by a VO2max confirmation test, 5 submaximal efforts, and 4 supramaximal running bouts at 115% of VO2max intensity (the first two supramaximal sessions were applied as familiarization trials) to measure the AC using two procedures; the maximum accumulated oxygen deficit (MAOD) and non-oxidative pathways energetics sum (AC[La-]+EPOCfast). The investigation was conducted in a single-blind and placebo-controlled manner, with participants performing the efforts first after being supplemented with a placebo (dextrose 20 g·day-1 for 5 days), and then, after a 7 day placebo washout period, they started the same procedure under creatine supplementation (20 g·day-1 for 5 days. This order was chosen due to the prolonged washout of creatine. MAOD was not different between placebo (3.35 ± 0.65 L) and creatine conditions (3.39 ± 0.79 L; P = 0.58) and presented a negligible effect [effect size (ES) = 0.08], similar to, AC[La-]+EPOCfast (placebo condition (3.66 ± 0.79 Land under creatine ingestion 3.82 ± 0.85 L; P = 0.07) presenting a small effect (ES = 0.20). The energetics from the phosphagen pathway increased significantly after creatine supplementation (1.66 ± 0.40 L) compared to the placebo condition (1.55 ± 0.42 L; P = 0.03). However, the glycolytic and oxidative pathways were not different between conditions. Furthermore, time to exhaustion did not differ between placebo (160.79 ± 37.76 s) and creatine conditions (163.64 ± 38.72; P = 0.49). Therefore, we can conclude that creatine supplementation improves the phosphagen energy contribution, but with no statistical effect on AC or time to exhaustion in supramaximal running.en
dc.description.affiliationLaboratory of Physiology and Sport Performance (LAFIDE) São Paulo State University (UNESP)
dc.description.affiliationPost-Graduate Program in Movement Sciences São Paulo State University (UNESP)
dc.description.affiliationDepartment of Physical Education School of Science São Paulo State University (UNESP)
dc.description.affiliationApplied Physiology and Nutrition Research Group University of São Paulo (USP)
dc.description.affiliationSchool of Physical Education and Sport University of São Paulo (USP)
dc.description.affiliationUnespLaboratory of Physiology and Sport Performance (LAFIDE) São Paulo State University (UNESP)
dc.description.affiliationUnespPost-Graduate Program in Movement Sciences São Paulo State University (UNESP)
dc.description.affiliationUnespDepartment of Physical Education School of Science São Paulo State University (UNESP)
dc.identifierhttp://dx.doi.org/10.3389/fphys.2019.00352
dc.identifier.citationFrontiers in Physiology, v. 10, n. APR, 2019.
dc.identifier.doi10.3389/fphys.2019.00352
dc.identifier.issn1664-042X
dc.identifier.scopus2-s2.0-85068225205
dc.identifier.urihttp://hdl.handle.net/11449/187824
dc.language.isoeng
dc.relation.ispartofFrontiers in Physiology
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.subjectAnaerobic capacity
dc.subjectCreatine
dc.subjectEnergy contribution
dc.subjectHigh-intensity effort
dc.subjectPerformance
dc.titleCreatine supplementation improves phosphagen energy pathway during supramaximal effort, but does not improve anaerobic capacity or performanceen
dc.typeArtigo
unesp.author.lattes2545518618024469[6]
unesp.author.orcid0000-0003-1065-4158[6]

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