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dc.contributor.authorJustin, Roberts,
dc.contributor.authorTarpey, Mike
dc.contributor.authorKass, Lindsy
dc.contributor.authorTarpey, Richard
dc.contributor.authorRoberts, Michael
dc.date.accessioned2018-01-24T13:51:47Z
dc.date.available2018-01-24T13:51:47Z
dc.date.issued2014-03-04
dc.identifier.citationJustin , R , Tarpey , M , Kass , L , Tarpey , R & Roberts , M 2014 , ' Assessing a commercially available sports drink on exogenous carbohydrate oxidation, fluid delivery and sustained exercise performance. ' , Journal of the International Society of Sports Nutrition , vol. 11 , no. 8 , pp. 1-14 . https://doi.org/10.1186/1550-2783-11-8
dc.identifier.otherPURE: 13258717
dc.identifier.otherPURE UUID: 67de2b42-144f-4905-ab14-26430b64f50b
dc.identifier.otherScopus: 84897575867
dc.identifier.urihttp://hdl.handle.net/2299/19613
dc.description© Roberts et al.; licensee BioMed Central Ltd. 2014. This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.
dc.description.abstractBackground: Whilst exogenous carbohydrate oxidation (CHOEXO) is influenced by mono- and disaccharide combinations, debate exists whether such beverages enhance fluid delivery and exercise performance. Therefore, this study aimed to ascertain CHOEXO, fluid delivery and performance times of a commercially available maltodextrin/ fructose beverage in comparison to an isocaloric maltodextrin beverage and placebo. Methods: Fourteen club level cyclists (age: 31.79 ± 10.02 years; height: 1.79 ± 0.06 m; weight: 73.69 ± 9.24 kg; VO2max: 60.38 ± 9.36 mL · kg·-1 min−1 ) performed three trials involving 2.5 hours continuous exercise at 50% maximum power output (Wmax: 176.71 ± 25.92 W) followed by a 60 km cycling performance test. Throughout each trial, athletes were randomly assigned, in a double-blind manner, either: (1) 1.1 g · min−1 maltodextrin + 0.6 g · min−1 fructose (MD + F), (2) 1.7 g · min−1 of maltodextrin (MD) or (3) flavoured water (P). In addition, the test beverage at 60 minutes contained 5.0 g of deuterium oxide (2 H2O) to assess quantification of fluid delivery. Expired air samples were analysed for CHOEXO according to the 13C/12C ratio method using gas chromatography continuous flow isotope ratio mass spectrometry. Results: Peak CHOEXO was significantly greater in the final 30 minutes of submaximal exercise with MD + F and MD compared to P (1.45 ± 0.09 g · min−1 , 1.07 ± 0.03 g · min−1 and 0.00 ± 0.01 g · min−1 respectively, P < 0.0001), and significantly greater for MD + F compared to MD (P = 0.005). The overall appearance of 2 H2O in plasma was significantly greater in both P and MD + F compared to MD (100.27 ± 3.57 ppm, 92.57 ± 2.94 ppm and 78.18 ± 4.07 ppm respectively, P < 0.003). There was no significant difference in fluid delivery between P and MD + F (P = 0.078). Performance times significantly improved with MD + F compared with both MD (by 7 min 22 s ± 1 min 56 s, or 7.2%) and P (by 6 min 35 s ± 2 min 33 s, or 6.5%, P < 0.05) over 60 km. Conclusions: A commercially available maltodextrin-fructose beverage improves CHOEXO and fluid delivery, which may benefit individuals during sustained moderate intensity exercise. The greater CHOEXO observed when consuming a maltodextrin-fructose beverage may support improved performance times. Keywords: Fructose, Maltodextrin, Exogenous carbohydrate oxidation, Fluid delivery, Performanceen
dc.format.extent14
dc.language.isoeng
dc.relation.ispartofJournal of the International Society of Sports Nutrition
dc.rights/dk/atira/pure/core/openaccesspermission/open
dc.titleAssessing a commercially available sports drink on exogenous carbohydrate oxidation, fluid delivery and sustained exercise performance.en
dc.contributor.institutionDepartment of Psychology and Sports Sciences
dc.contributor.institutionAgriculture, Veterinary and Food Sciences
dc.contributor.institutionCentre for Research in Psychology and Sport Sciences
dc.contributor.institutionSport, Health and Exercise
dc.contributor.institutionAdaptive Physiology and Functional Nutrition
dc.contributor.institutionHealth and Wellbeing
dc.contributor.institutionSchool of Life and Medical Sciences
dc.contributor.institutionWeight and Obesity Research Group
dc.description.statusPeer reviewed
dc.relation.schoolSchool of Life and Medical Sciences
dc.description.versiontypeFinal Published version
dcterms.dateAccepted2014-02-25
rioxxterms.versionVoR
rioxxterms.versionofrecordhttps://doi.org/10.1186/1550-2783-11-8
rioxxterms.licenseref.urihttp://creativecommons.org/licenses/by/4.0/
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue
herts.rights.accesstypeopenAccess


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