Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/12365
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dc.contributor.authorHunter, Angusen_UK
dc.contributor.authorGibson, Alan St Clairen_UK
dc.contributor.authorCollins, Malcolm Ren_UK
dc.contributor.authorLambert, Michaelen_UK
dc.contributor.authorNoakes, Timothy Den_UK
dc.date.accessioned2018-04-23T22:31:15Z-
dc.date.available2018-04-23T22:31:15Z-
dc.date.issued2002-12en_UK
dc.identifier.urihttp://hdl.handle.net/1893/12365-
dc.description.abstractThis study analyzed the effect of caffeine ingestion on performance during a repeated-measures, 100-km, laboratory cycling time trial that included bouts of 1- and 4-km high intensity epochs (HIE). Eight highly trained cyclists participated in 3 separate trials - placebo ingestion before exercise with a placebo carbohydrate solution and placebo tablets during exercise (Pl), or placebo ingestion before exercise with a 7% carbohydrate drink and placebo tablets during exercise (Cho), or caffeine tablet ingestion before and during exercise with 7% carbohydrate (Caf). Placebo (twice) or 6 mg · kg-1 caffeine was ingested 60 min prior to starting 1 of the 3 cycling trials, during which subjects ingested either additional placebos or a caffeine maintenance dose of 0.33 mg · kg-1 every 15 min to trial completion. The 100-km time trial consisted of five 1-km HIE after 10, 32, 52, 72, and 99 km, as well as four 4-km HIE after 20, 40, 60, and 80 km. Subjects were instructed to complete the time trial and all HIE as fast as possible. Plasma (caffeine) was significantly higher during Caf (0.43 ± 0.56 and 1.11 ± 1.78 mM pre vs. post Pl; and 47.32 ± 12.01 and 72.43 ± 29.08 mM pre vs. post Caf). Average power, HIE time to completion, and 100-km time to completion were not different between trials. Mean heart rates during both the 1-km HIE (184.0 ± 9.8 Caf; 177.0 ± 5.8 Pl; 177.4 ± 8.9 Cho) and 4-km HIE (181.7 ± 5.7 Caf; 174.3 ± 7.2 Pl; 175.6 ± 7.6 Cho;p less than .05) was higher in Caf than in the other groups. No significant differences were found between groups for either EMG amplitude (IEMG) or mean power frequency spectrum (MPFS). IEMG activity and performance were not different between groups but were both higher in the 1-km HIE, indicating the absence of peripheral fatigue and the presence of a centrally-regulated pacing strategy that is not altered by caffeine ingestion. Caffeine may be without ergogenic benefit during endurance exercise in which the athlete begins exercise with a defined, predetermined goal measured as speed or distance.en_UK
dc.language.isoenen_UK
dc.publisherHuman Kinetics for the International Society of Sport Nutritionen_UK
dc.relationHunter A, Gibson ASC, Collins MR, Lambert M & Noakes TD (2002) Caffeine ingestion does not alter performance during a 100-km cycling time-trial performance. International Journal of Sport Nutrition and Exercise Metabolism, 12 (4), pp. 438-452. http://journals.humankinetics.com/ijsnem-back-issues/ijsnemVolume12Issue4December/CaffeineIngestionDoesNotAlterPerformanceDuringa100kmCyclingTimeTrialPerformanceen_UK
dc.rightsPublisher allows this work to be made available in this repository. Published in International Journal of Sport Nutrition and Exercise Metabolism, Volume 12, Issue 4, December 2002 by Human Kinetics with the following policy: The author retains the right to post an electronic version of the finalized article on electronic repositories controlled by the authors’ institution, provided that the electronic version is in PDF or other image capturing format.en_UK
dc.subjectCaffeineen_UK
dc.subjectCycle time trialen_UK
dc.subjectEMGen_UK
dc.subjectPerformanceen_UK
dc.titleCaffeine ingestion does not alter performance during a 100-km cycling time-trial performanceen_UK
dc.typeJournal Articleen_UK
dc.identifier.pmid12500987en_UK
dc.citation.jtitleInternational Journal of Sport Nutrition and Exercise Metabolismen_UK
dc.citation.issn1526-484Xen_UK
dc.citation.volume12en_UK
dc.citation.issue4en_UK
dc.citation.spage438en_UK
dc.citation.epage452en_UK
dc.citation.publicationstatusPublisheden_UK
dc.citation.peerreviewedRefereeden_UK
dc.type.statusVoR - Version of Recorden_UK
dc.identifier.urlhttp://journals.humankinetics.com/ijsnem-back-issues/ijsnemVolume12Issue4December/CaffeineIngestionDoesNotAlterPerformanceDuringa100kmCyclingTimeTrialPerformanceen_UK
dc.author.emaila.m.hunter1@stir.ac.uken_UK
dc.contributor.affiliationSporten_UK
dc.contributor.affiliationUniversity of Cape Townen_UK
dc.contributor.affiliationUniversity of Cape Townen_UK
dc.contributor.affiliationUniversity of Cape Townen_UK
dc.contributor.affiliationUniversity of Cape Townen_UK
dc.identifier.scopusid2-s2.0-0036972920en_UK
dc.identifier.wtid890228en_UK
dc.contributor.orcid0000-0001-7562-6145en_UK
dcterms.dateAccepted2002-12-31en_UK
dc.date.filedepositdate2013-04-29en_UK
rioxxterms.typeJournal Article/Reviewen_UK
rioxxterms.versionVoRen_UK
local.rioxx.authorHunter, Angus|0000-0001-7562-6145en_UK
local.rioxx.authorGibson, Alan St Clair|en_UK
local.rioxx.authorCollins, Malcolm R|en_UK
local.rioxx.authorLambert, Michael|en_UK
local.rioxx.authorNoakes, Timothy D|en_UK
local.rioxx.projectInternal Project|University of Stirling|https://isni.org/isni/0000000122484331en_UK
local.rioxx.freetoreaddate2013-04-29en_UK
local.rioxx.licencehttp://www.rioxx.net/licenses/all-rights-reserved|2013-04-29|en_UK
local.rioxx.filenameHunter_2002_Caffeine_Ingestion_Does_Not_Alter_Performance.pdfen_UK
local.rioxx.filecount1en_UK
local.rioxx.source1526-484Xen_UK
Appears in Collections:Faculty of Health Sciences and Sport Journal Articles

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