Chronic carbohydrate restriction improves endurance capacity and body composition in men and women

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dc.citation.issue1
dc.citation.volume11
dc.contributor.authorO'Connor W
dc.contributor.authorO'Connor E
dc.contributor.authorBarnes M
dc.contributor.authorMiller M
dc.contributor.authorGardener H
dc.contributor.authorStannard S
dc.contributor.editorZabala M
dc.date.accessioned2024-06-18T21:41:55Z
dc.date.available2024-06-18T21:41:55Z
dc.date.issued2022-06-06
dc.description.abstractThis study was designed to test whether adaptation to a CHO-restricted diet affects physical capacity during prolonged exercise. It is hypothesised that chronically reducing an individual’s dietary carbohydrate intake during training will increase their maximal rate of fatty acid oxidation during subsequent exercise compared to a chronic high carbohydrate diet. Thirteen highly trained endurance athletes (eight males, VO2max 66.0 ± 9.5 ml/kg/min, five females VO2max 50.6 ± 8.4 ml/kg/min) consumed a high (>5 g CHO/kg/day) or low (<2 g CHO/kg/day) carbohydrate training diet for four weeks in a randomized cross-over design. Performance was measured after a 24 h high carbohydrate “loading” regime, through a self-paced time trial to complete a fixed workload equivalent to five hours at a workload calculated to elicit 55% VO2max. Although time to completion was not significantly different between diets, the average absolute (watts) and relative (W/kg) power outputs were significantly better on the carbohydrate restricted diet (p = 0.03 and 0.02 respectively). Both sexes responded similarly in terms of performance whilst only women significantly improved body composition when carbohydrate was restricted (p = 0.02). Results from this study highlight that when carbohydrate is restricted during training, trained endurance athletes show improved ultra-endurance performance relative to their body mass.
dc.description.confidentialfalse
dc.format.pagination70-83
dc.identifier.citationO'Connor W, O'Connor E, Barnes M, Miller M, Gardener H, Stannard S. (2022). Chronic carbohydrate restriction improves endurance capacity and body composition in men and women. Journal of Science and Cycling. 11. 1. (pp. 70-83).
dc.identifier.doi10.28985/1322.jsc.04
dc.identifier.elements-typejournal-article
dc.identifier.issn2254-7053
dc.identifier.urihttps://mro.massey.ac.nz/handle/10179/69899
dc.languageEnglish
dc.publisherCycling Research Center
dc.publisher.urihttps://www.jsc-journal.com/index.php/JSC/article/view/712
dc.relation.isPartOfJournal of Science and Cycling
dc.rights(c) The author/sen
dc.rights.licenseCC BYen
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en
dc.subjectbeta-Oxidation
dc.subjectLow carbohydrate high fat
dc.subjectmetabolic flexibility
dc.subjectultra-endurance
dc.subjectcarbohydrate loading
dc.titleChronic carbohydrate restriction improves endurance capacity and body composition in men and women
dc.typeJournal article
pubs.elements-id461395
pubs.organisational-groupCollege of Health
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