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dc.contributor.authorRodger, Shemen_NZ
dc.contributor.authorPlews, Danielen_NZ
dc.contributor.authorLaursen, Paulen_NZ
dc.contributor.authorDriller, Matthew W.en_NZ
dc.date.accessioned2017-07-18T00:59:56Z
dc.date.available2017-05-25en_NZ
dc.date.available2017-07-18T00:59:56Z
dc.date.issued2017-05-25en_NZ
dc.identifier.citationRodger, S., Plews, D., Laursen, P., & Driller, M. W. (2017). Oral β-hydroxybutyrate salt fails to improve 4-minute cycling performance following submaximal exercise. Journal of Science and Cycling, 6(1), 26–31.en
dc.identifier.issn2254-7053en_NZ
dc.identifier.urihttp://hdl.handle.net/10289/11199
dc.description.abstractThe purpose of the present study was to examine the effects of an oral β-hydroxybutyrate (BHB) supplement on cycling performance. Using a double-blind, placebo-controlled, crossover design, 12 highly-trained cyclists (mean ± SD: age; 35 ± 8 y, mass; 74.5 ± 7.6 kg, VO₂ₚₑₐₖ; 68.0 ± 6.7 ml.min⁻¹kg⁻¹) were supplemented with two 30 ml servings of an oral BHB supplement or placebo formula (PLA) prior to and during exercise. Participants cycled at a submaximal intensity (80% of second ventilatory threshold) for 90-min, followed by a 4-min maximal cycling performance test (4PT). The difference in 4PT power output between trials was not statistically significant (p > 0.05) and was associated with a trivial effect (ES ±90%CI = 0.19 ±0.37). Ingestion of the BHB supplement was associated with a large increase in blood BHB concentrations when compared to PLA for the 4PT (ES = 1.75 ±0.50, p < 0.01). The increased BHB concentration was accompanied by a moderate increase in the respiratory exchange ratio (RER) during the submaximal exercise phase (ES = 0.54 ±0.45, p = >0.05) and a moderate increase during the 4PT (ES = 0.78 ±0.57, p = 0.03). Submaximal VO₂ did not differ between trials, however, VO₂ was higher during the 4PT phase in the BHB trial (ES = 0.28 ±0.32; small). In conclusion, BHB supplementation altered blood BHB concentrations, RER and VO₂ values during steady state sub-maximal exercise, but did not improve 4-minute cycling performance.
dc.format.mimetypeapplication/pdf
dc.language.isoen
dc.publisherCycling Research Centeren_NZ
dc.relation.urihttp://www.jsc-journal.com/ojs/index.php?journal=JSC&page=article&op=view&path%5B%5D=304
dc.rights© 2017 Rodger licensee JSC. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
dc.titleOral β-hydroxybutyrate salt fails to improve 4-minute cycling performance following submaximal exerciseen_NZ
dc.typeJournal Article
dc.relation.isPartOfJournal of Science and Cyclingen_NZ
pubs.begin-page26
pubs.elements-id199994
pubs.end-page31
pubs.issue1en_NZ
pubs.organisational-group/Waikato
pubs.organisational-group/Waikato/2018 PBRF
pubs.organisational-group/Waikato/FHSP
pubs.organisational-group/Waikato/FHSP/2018 PBRF - FHSP
pubs.publication-statusPublisheden_NZ
pubs.publisher-urlhttp://www.jsc-journal.com/ojs/index.php?journal=JSC&page=article&op=view&path%5B%5D=304en_NZ
pubs.volume6en_NZ


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