Caffeine Alters Anaerobic Distribution and Pacing during a 4000-m Cycling Time Trial

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dc.contributor.author Santos, Ralmony de Alcantara
dc.contributor.author Kiss, Maria Augusta Peduti Dal Molin]
dc.contributor.author Silva-Cavalcante, Marcos David
dc.contributor.author Correia-Oliveira, Carlos Rafaell [UNIFESP]
dc.contributor.author Bertuzzi, Romulo
dc.contributor.author Bishop, David John
dc.contributor.author Lima-Silva, Adriano Eduardo
dc.date.accessioned 2016-01-24T14:34:26Z
dc.date.available 2016-01-24T14:34:26Z
dc.date.issued 2013-09-18
dc.identifier http://dx.doi.org/10.1371/journal.pone.0075399
dc.identifier.citation Plos One. San Francisco: Public Library Science, v. 8, n. 9, 10 p., 2013.
dc.identifier.issn 1932-6203
dc.identifier.uri http://repositorio.unifesp.br/handle/11600/36761
dc.description.abstract The purpose of the present study was to investigate the effects of caffeine ingestion on pacing strategy and energy expenditure during a 4000-m cycling time-trial (TT). Eight recreationally-trained male cyclists volunteered and performed a maximal incremental test and a familiarization test on their first and second visits, respectively. On the third and fourth visits, the participants performed a 4000-m cycling TT after ingesting capsules containing either caffeine (5 mg.kg(-1) of body weight, CAF) or cellulose (PLA). the tests were applied in a double-blind, randomized, repeated-measures, cross-over design. When compared to PLA, CAF ingestion increased mean power output [219.1 +/- 18.6 vs. 232.8 +/- 21.4 W; effect size (ES) = 0.60 (95% CI = 0.05 to 1.16), p = 0.034] and reduced the total time [419 +/- 13 vs. 409 +/- 12 s; ES = -0.71 (95% CI = -0.09 to -1.13), p = 0.026]. Furthermore, anaerobic contribution during the 2200-, 2400-, and 2600-m intervals was significantly greater in CAF than in PLA (p<0.05). However, the mean anaerobic [64.9 +/- 20.1 vs. 57.3 +/- 17.5 W] and aerobic [167.9 +/- 4.3 vs. 161.8 +/- 11.2 W] contributions were similar between conditions (p>0.05). Similarly, there were no significant differences between CAF and PLA for anaerobic work (26363 +/- 7361 vs. 23888 +/- 6795 J), aerobic work (68709 +/- 2118 vs. 67739 +/- 3912 J), or total work (95245 +/- 8593 vs. 91789 +/- 7709 J), respectively. There was no difference for integrated electromyography, blood lactate concentration, heart rate, and ratings of perceived exertion between the conditions. These results suggest that caffeine increases the anaerobic contribution in the middle of the time trial, resulting in enhanced overall performance. en
dc.description.sponsorship Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.format.extent 10
dc.language.iso eng
dc.publisher Public Library Science
dc.relation.ispartof Plos One
dc.rights Acesso aberto
dc.title Caffeine Alters Anaerobic Distribution and Pacing during a 4000-m Cycling Time Trial en
dc.type Artigo
dc.contributor.institution Universidade Federal de Pernambuco (UFPE)
dc.contributor.institution Universidade Federal de São Paulo (UNIFESP)
dc.contributor.institution Victoria Univ
dc.description.affiliation Univ Fed Pernambuco, Dept Phys Educ & Sports Sci CAV, Sports Sci Res Grp, Vitoria de Santo Anta, PE, Brazil
dc.description.affiliation Universidade Federal de São Paulo, Dept Med, Div Nephrol, São Paulo, Brazil
dc.description.affiliation Universidade Federal de São Paulo, Sch Phys Educ & Sport, Endurance Sports Res Grp, São Paulo, Brazil
dc.description.affiliation Victoria Univ, Inst Sport Exercise & Act Living, Melbourne, Vic 8001, Australia
dc.description.affiliationUnifesp Universidade Federal de São Paulo, Dept Med, Div Nephrol, São Paulo, Brazil
dc.description.affiliationUnifesp Universidade Federal de São Paulo, Sch Phys Educ & Sport, Endurance Sports Res Grp, São Paulo, Brazil
dc.description.sponsorshipID CAPES: 58
dc.identifier.file WOS000324695900115.pdf
dc.identifier.doi 10.1371/journal.pone.0075399
dc.description.source Web of Science
dc.identifier.wos WOS:000324695900115



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