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Habitual dietary protein intake affects body iron status in Japanese female college rhythmic gymnasts: a follow-up study

BACKGROUND: Many rhythmic gymnasts stay lean by reducing their body weight (BW); however, this may result in iron deficiency (ID). Our previous cross-sectional study reported an association between ID incidence and protein intake in gymnasts during the pre-season. The present study aimed to examine...

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Autores principales: Kokubo, Yuki, Kisara, Kumiko, Yokoyama, Yuri, Ohira-Akiyama, Yoshiko, Tada, Yuki, Hida, Azumi, Ishizaki, Sakuko, Kawano, Yukari
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer International Publishing 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4920737/
https://www.ncbi.nlm.nih.gov/pubmed/27386311
http://dx.doi.org/10.1186/s40064-016-2569-7
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author Kokubo, Yuki
Kisara, Kumiko
Yokoyama, Yuri
Ohira-Akiyama, Yoshiko
Tada, Yuki
Hida, Azumi
Ishizaki, Sakuko
Kawano, Yukari
author_facet Kokubo, Yuki
Kisara, Kumiko
Yokoyama, Yuri
Ohira-Akiyama, Yoshiko
Tada, Yuki
Hida, Azumi
Ishizaki, Sakuko
Kawano, Yukari
author_sort Kokubo, Yuki
collection PubMed
description BACKGROUND: Many rhythmic gymnasts stay lean by reducing their body weight (BW); however, this may result in iron deficiency (ID). Our previous cross-sectional study reported an association between ID incidence and protein intake in gymnasts during the pre-season. The present study aimed to examine the association between dietary protein intake and ID incidence in a 2-year follow-up study. METHODS: Elite Japanese female college rhythmic gymnasts [mean age ± standard deviation (SD): 18.4 ± 0.5 years] were recruited on a voluntary basis every August for 9 years. Anthropometric, dietary intake, and hematological parameters were measured at baseline and 2 years later. A total of 20 participants without ID at baseline were divided into either a lower (L, n = 11) or higher (H, n = 9) protein group based on median protein intake (1.3 g protein/kg BW). RESULTS: Participants consumed 1.08 ± 0.16 and 1.55 ± 0.14 g/kg BW of protein in the L and H groups, respectively. No significant changes in the intake of protein and other nutrients were observed between baseline and 2-year follow-up in both groups. ID was observed in a total of eight (72.8 %) participants in the L group and one (11.2 %) in the H group at follow-up. The incidence of ID was significantly lower in the H group than the L group (Fisher’s exact test, odds ratio, 0.043; 95 % CI 0.004–0.552; p = 0.010). CONCLUSIONS: During the pre-season weight loss period, habitually higher protein intake may reduce ID incidence among elite college female rhythmic gymnasts.
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spelling pubmed-49207372016-07-06 Habitual dietary protein intake affects body iron status in Japanese female college rhythmic gymnasts: a follow-up study Kokubo, Yuki Kisara, Kumiko Yokoyama, Yuri Ohira-Akiyama, Yoshiko Tada, Yuki Hida, Azumi Ishizaki, Sakuko Kawano, Yukari Springerplus Research BACKGROUND: Many rhythmic gymnasts stay lean by reducing their body weight (BW); however, this may result in iron deficiency (ID). Our previous cross-sectional study reported an association between ID incidence and protein intake in gymnasts during the pre-season. The present study aimed to examine the association between dietary protein intake and ID incidence in a 2-year follow-up study. METHODS: Elite Japanese female college rhythmic gymnasts [mean age ± standard deviation (SD): 18.4 ± 0.5 years] were recruited on a voluntary basis every August for 9 years. Anthropometric, dietary intake, and hematological parameters were measured at baseline and 2 years later. A total of 20 participants without ID at baseline were divided into either a lower (L, n = 11) or higher (H, n = 9) protein group based on median protein intake (1.3 g protein/kg BW). RESULTS: Participants consumed 1.08 ± 0.16 and 1.55 ± 0.14 g/kg BW of protein in the L and H groups, respectively. No significant changes in the intake of protein and other nutrients were observed between baseline and 2-year follow-up in both groups. ID was observed in a total of eight (72.8 %) participants in the L group and one (11.2 %) in the H group at follow-up. The incidence of ID was significantly lower in the H group than the L group (Fisher’s exact test, odds ratio, 0.043; 95 % CI 0.004–0.552; p = 0.010). CONCLUSIONS: During the pre-season weight loss period, habitually higher protein intake may reduce ID incidence among elite college female rhythmic gymnasts. Springer International Publishing 2016-06-24 /pmc/articles/PMC4920737/ /pubmed/27386311 http://dx.doi.org/10.1186/s40064-016-2569-7 Text en © The Author(s) 2016 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
spellingShingle Research
Kokubo, Yuki
Kisara, Kumiko
Yokoyama, Yuri
Ohira-Akiyama, Yoshiko
Tada, Yuki
Hida, Azumi
Ishizaki, Sakuko
Kawano, Yukari
Habitual dietary protein intake affects body iron status in Japanese female college rhythmic gymnasts: a follow-up study
title Habitual dietary protein intake affects body iron status in Japanese female college rhythmic gymnasts: a follow-up study
title_full Habitual dietary protein intake affects body iron status in Japanese female college rhythmic gymnasts: a follow-up study
title_fullStr Habitual dietary protein intake affects body iron status in Japanese female college rhythmic gymnasts: a follow-up study
title_full_unstemmed Habitual dietary protein intake affects body iron status in Japanese female college rhythmic gymnasts: a follow-up study
title_short Habitual dietary protein intake affects body iron status in Japanese female college rhythmic gymnasts: a follow-up study
title_sort habitual dietary protein intake affects body iron status in japanese female college rhythmic gymnasts: a follow-up study
topic Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4920737/
https://www.ncbi.nlm.nih.gov/pubmed/27386311
http://dx.doi.org/10.1186/s40064-016-2569-7
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