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dc.contributor.authorGlaister, Mark
dc.contributor.authorWilliams, Benjamin Henley
dc.contributor.authorMuniz-Pumares, Daniel
dc.contributor.authorBalsalobre-Fernández, Carlos
dc.contributor.authorFoley, Paul
dc.date.accessioned2019-01-17T10:56:29Z
dc.date.available2019-01-17T10:56:29Z
dc.date.issued2016-08-17
dc.identifier.citationGlaister, M., Williams, B.H., Muniz-Pumares, D., Balsalobre-Fernández, C. and Foley, P. (2016) 'The effects of caffeine supplementation on physiological responses to submaximal exercise in endurance-trained men', PloS one, 11(8), p.e0161375.en_US
dc.identifier.issn1932-6203
dc.identifier.urihttp://hdl.handle.net/10369/10218
dc.descriptionArticle published in PLoS One, available open access at https://doi.org/10.1371/journal.pone.0161375en_US
dc.description.abstractObjectives The aim of this study was to evaluate the effects of caffeine on physiological responses to submaximal exercise, with a focus on blood lactate concentration ([BLa]). Methods Using a randomised, single-blind, crossover design; 16 endurance-trained, male cyclists (age: 38 ± 8 years; height: 1.80 ± 0.05 m; body mass: 76.6 ± 7.8 kg; : 4.3 ± 0.6 L∙min-1) completed four trials on an electromagnetically-braked cycle ergometer. Each trial consisted of a six-stage incremental test (3 minute stages) followed by 30 minutes of passive recovery. One hour before trials 2–4, participants ingested a capsule containing 5 mg∙kg-1 of either caffeine or placebo (maltodextrin). Trials 2 and 3 were designed to evaluate the effects of caffeine on various physiological responses during exercise and recovery. In contrast, Trial 4 was designed to evaluate the effects of caffeine on [BLa] during passive recovery from an end-exercise concentration of 4 mmol∙L-1. Results Relative to placebo, caffeine increased [BLa] during exercise, independent of exercise intensity (mean difference: 0.33 ± 0.41 mmol∙L-1; 95% likely range: 0.11 to 0.55 mmol∙L-1), but did not affect the time-course of [BLa] during recovery (p = 0.604). Caffeine reduced ratings of perceived exertion (mean difference: 0.5 ± 0.7; 95% likely range: 0.1 to 0.9) and heart rate (mean difference: 3.6 ± 4.2 b∙min-1; 95% likely range: 1.3 to 5.8 b∙min-1) during exercise, with the effect on the latter dissipating as exercise intensity increased. Supplement × exercise intensity interactions were observed for respiratory exchange ratio (p = 0.004) and minute ventilation (p = 0.034). Conclusions The results of the present study illustrate the clear, though often subtle, effects of caffeine on physiological responses to submaximal exercise. Researchers should be aware of these responses, particularly when evaluating the physiological effects of various experimental interventions.en_US
dc.language.isoenen_US
dc.publisherPublic Library of Scienceen_US
dc.relation.ispartofseriesPLoS One;
dc.titleThe Effects of Caffeine Supplementation on Physiological Responses to Submaximal Exercise in Endurance-Trained Menen_US
dc.typeArticleen_US
dc.identifier.doihttps://doi.org/10.1371/journal.pone.0161375
dcterms.dateAccepted2016-08-04
rioxxterms.funderCardiff Metropolitan Universityen_US
rioxxterms.identifier.projectCardiff Metropolian (Internal)en_US
rioxxterms.versionVoRen_US
rioxxterms.licenseref.urihttp://creativecommons.org/licenses/by/4.0/en_US
rioxxterms.licenseref.startdate2019-01-17
rioxxterms.funder.project37baf166-7129-4cd4-b6a1-507454d1372een_US


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