dc.contributor.author | McKay, Alannah KA | |
dc.contributor.author | Peeling, Peter | |
dc.contributor.author | Pyne, David B | |
dc.contributor.author | Welvaert, Marijke | |
dc.contributor.author | Tee, Nicolin | |
dc.contributor.author | Leckey, Jill J | |
dc.contributor.author | Sharma, Avish P | |
dc.contributor.author | Ross, Megan LR | |
dc.contributor.author | Garvican-Lewis, Laura A | |
dc.contributor.author | van Swelm, Rachel PL | |
dc.contributor.author | Laarakkers, Coby M | |
dc.contributor.author | Burke, Louise M | |
dc.date.accessioned | 2019-07-04T12:35:41Z | |
dc.date.available | 2019-07-04T12:35:41Z | |
dc.date.issued | 2019 | |
dc.identifier.issn | 1440-2440 | |
dc.identifier.doi | 10.1016/j.jsams.2018.12.015 | |
dc.identifier.uri | http://hdl.handle.net/10072/384952 | |
dc.description.abstract | Objectives:
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.peerreviewed | Yes | |
dc.language | English | |
dc.language.iso | eng | |
dc.relation.ispartofpagefrom | 635 | |
dc.relation.ispartofpageto | 640 | |
dc.relation.ispartofissue | 6 | |
dc.relation.ispartofjournal | Journal of Science and Medicine in Sport | |
dc.relation.ispartofvolume | 22 | |
dc.subject.fieldofresearch | Sports science and exercise | |
dc.subject.fieldofresearch | Medical physiology | |
dc.subject.fieldofresearch | Health services and systems | |
dc.subject.fieldofresearch | Public health | |
dc.subject.fieldofresearchcode | 4207 | |
dc.subject.fieldofresearchcode | 3208 | |
dc.subject.fieldofresearchcode | 4203 | |
dc.subject.fieldofresearchcode | 4206 | |
dc.title | Acute carbohydrate ingestion does not influence the post-exercise iron-regulatory response in elite keto-adapted race walkers | |
dc.type | Journal article | |
dc.type.description | C1 - Articles | |
dc.type.code | C - Journal Articles | |
gro.hasfulltext | No Full Text | |
gro.griffith.author | Sharma, Avish | |