Timing is everything, but does it really matter? Impact of 8-weeks morning versus evening iron supplementation in ballet and contemporary dancers
Journal article
Attwell, Caitlin, McKay, Alannah, Sim, Marc, Dugan, Cory, Nicholas, Joanna, Hopper, Luke and Peeling, Peter. (2023). Timing is everything, but does it really matter? Impact of 8-weeks morning versus evening iron supplementation in ballet and contemporary dancers. European Journal of Sport Science. 23(12), pp. 2275-2282. https://doi.org/10.1080/17461391.2023.2224285
Authors | Attwell, Caitlin, McKay, Alannah, Sim, Marc, Dugan, Cory, Nicholas, Joanna, Hopper, Luke and Peeling, Peter |
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Abstract | The effectiveness of a morning versus evening oral iron supplement strategy to increase iron stores was explored. Ballet and contemporary dancers with serum ferritin (sFer) < 50μg/L (n = 14), were supplemented daily with 105 mg elemental oral iron in either the morning (FeAM) or evening (FePM) for 8 weeks. A control group (n = 6) with sFer >50μg/L were given no supplement over the same period. Dancers’ sFer were measured at baseline and post-intervention. Assessment of daily training load, dietary intake, and menstruation were made. A significant interaction (p < 0.001) showed the within group sFer change over the 8-week intervention in FeAM (+25.9 ± 10.5μg/L) and FePM, (+22.3 ± 13.6μg/L) was significantly different to CON (−30.17 ± 28.7μg/L; both p = 0.001). This change was not different between FeAM and FePM (p = 0.778). sFer levels within FeAM and FePM significantly increased over the 8-weeks; however, they significantly decreased in the CON group (all p < 0.05). Post-intervention sFer levels were no longer different between the three groups (p > 0.05). Training load, dietary intake, and number of menstrual cycles incurred were similar between FeAM and FePM (p > 0.05). Oral iron supplementation in either the morning or evening appears equally effective in increasing sFer levels in dancers with sub-optimal iron status. |
Keywords | iron supplement; iron deficiency; nutrition minerals |
Year | 2023 |
Journal | European Journal of Sport Science |
Journal citation | 23 (12), pp. 2275-2282 |
Publisher | Routledge |
ISSN | 1746-1391 |
Digital Object Identifier (DOI) | https://doi.org/10.1080/17461391.2023.2224285 |
PubMed ID | 37291690 |
Scopus EID | 2-s2.0-85164691980 |
Open access | Published as ‘gold’ (paid) open access |
Page range | 2275-2282 |
Funder | Royal Perth Hospital |
Publisher's version | License File Access Level Open |
Output status | Published |
Publication dates | |
Online | 10 Jul 2023 |
Publication process dates | |
Deposited | 02 Apr 2025 |
Additional information | © 2023 The Author(s) This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The terms on which this article has been published allow the posting of the Accepted Manuscript in a repository by the author(s) or with their consent. |
https://acuresearchbank.acu.edu.au/item/918v7/timing-is-everything-but-does-it-really-matter-impact-of-8-weeks-morning-versus-evening-iron-supplementation-in-ballet-and-contemporary-dancers
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Publisher's version
OA_Attwell_2023_Timing_is_everything_but_does_it.pdf | |
License: CC BY 4.0 | |
File access level: Open |
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