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dc.contributor.authorMcKay, Alannah KA
dc.contributor.authorPeeling, Peter
dc.contributor.authorPyne, David B
dc.contributor.authorWelvaert, Marijke
dc.contributor.authorTee, Nicolin
dc.contributor.authorLeckey, Jill J
dc.contributor.authorSharma, Avish P
dc.contributor.authorRoss, Megan LR
dc.contributor.authorGarvican-Lewis, Laura A
dc.contributor.authorvan Swelm, Rachel PL
dc.contributor.authorLaarakkers, Coby M
dc.contributor.authorBurke, Louise M
dc.date.accessioned2019-07-04T12:35:41Z
dc.date.available2019-07-04T12:35:41Z
dc.date.issued2019
dc.identifier.issn1440-2440
dc.identifier.doi10.1016/j.jsams.2018.12.015
dc.identifier.urihttp://hdl.handle.net/10072/384952
dc.description.abstractObjectives: Adhering to a low carbohydrate (CHO) high fat (LCHF) diet can alter markers of iron metabolism in endurance athletes. This investigation examined the re-introduction of CHO prior to, and during exercise on the iron-regulatory response to exercise in a homogenous (in regard to serum ferritin concentration) group of athletes adapted to a LCHF diet. Design: Parallel groups design. Methods: Three weeks prior to the exercise trials, twenty-three elite race walkers adhered to either a CHO-rich (n = 14) or LCHF diet (n = 9). A standardised 19–25 km race walk was performed while athletes were still adhering to their allocated dietary intervention (Adapt). A second test was performed three days later, where all athletes were placed on a high CHO diet (CHO Restoration). Venous blood samples were collected pre-, post- and 3 h post-exercise and measured for interleukin-6 (IL-6) and hepcidin-25. Results: The post-exercise IL-6 increase was greater in LCHF (p < 0.001) during both the Adapt (LCHF: 13.1-fold increase; 95% CI: 5.6–23.0, CHO: 8.0-fold increase; 5.1–11.1) and CHO Restoration trials (LCHF: 18.5-fold increase; 10.9–28.9, CHO: 6.3-fold increase; 3.9–9.5); outcomes were not different between trials (p = 0.84). Hepcidin-25 concentrations increased 3 h post-exercise (p < 0.001), however, they did not differ between trials (p = 0.46) or diets (p = 0.84). Conclusions: The elevated IL-6 response in athletes adapted to a LCHF diet was not attenuated by an acute increase in exogenous CHO availability. Despite diet-induced differences in IL-6 response to exercise, post-exercise hepcidin levels were similar between diets and trials, indicating CHO availability has minimal influence on post-exercise iron metabolism.
dc.description.peerreviewedYes
dc.languageEnglish
dc.language.isoeng
dc.relation.ispartofpagefrom635
dc.relation.ispartofpageto640
dc.relation.ispartofissue6
dc.relation.ispartofjournalJournal of Science and Medicine in Sport
dc.relation.ispartofvolume22
dc.subject.fieldofresearchSports science and exercise
dc.subject.fieldofresearchMedical physiology
dc.subject.fieldofresearchHealth services and systems
dc.subject.fieldofresearchPublic health
dc.subject.fieldofresearchcode4207
dc.subject.fieldofresearchcode3208
dc.subject.fieldofresearchcode4203
dc.subject.fieldofresearchcode4206
dc.titleAcute carbohydrate ingestion does not influence the post-exercise iron-regulatory response in elite keto-adapted race walkers
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.hasfulltextNo Full Text
gro.griffith.authorSharma, Avish


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