The Effect of a Short Term Exercise Schedule on Oral Iron Bio-availability and Iron Incorporation
Iron metabolism may undergo changes during exercise, with reductions in classical iron status markers due to a variety of postulated mechanism which include hemodilution, increased iron loss, hemolysis and increased iron storage in muscles. Furthermore, it has been reported that vigorous training increases hepcidin, a central regulatory peptide in iron metabolism. This increase has been ascribed to the presence of subclinical inflammation. Increased hepcidin levels may reduce iron bioavailability and iron incorporation in erythrocytes.
Twenty healthy men subjects will be recruited as subjects for this study. Subjects should be generally healthy, with no history of blood donation in the last 6 months, should weigh less than 85 Kg, and not take iron supplements and/or multivitamin supplements. Subjects should have familiarity to sports and running, but not currently (i.e. in the past 3 months) training for more than 1h per week on average.
The aim of this study is to measure an iron bioavailability during a resting and an exercise phase lasting approx. 14 days with training sessions on alternate days. Subjects will participate in both restign and exercising protocols and act as their own controls during the study. Iron bioavailability will be measured via the incorporation of stable isotopic labels 14 days after administration. To control for changes in blood volume during the course of the study, blood volume of the participating subjects will be measured before and after the exercise phase with the CO-rebreathing method.
Measurement of iron bioavailability and iron incorporation in a resting and exercising phase will allow determine if the increased level of hepcidin seen in in exercise will induce a lower iron bioavailability and iron incorporation during exercise.
研究概览
研究类型
注册 (实际的)
联系人和位置
学习地点
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Zürich、瑞士、8092
- ETH Zurich
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参与标准
资格标准
适合学习的年龄
接受健康志愿者
有资格学习的性别
取样方法
研究人群
描述
Inclusion Criteria:
- men, Generally Healthy age between 18-50 years;
- BMI between 18-25;
- nonanemic (Hb < 120 g/L);
- no intake of vitamins and nutritional supplements;
- no recent blood donation (<4 months);
- no previous participation in studies with stable iron isotopes in the past.
Exclusion Criteria:
- Chronic diseases, Metabolic diseases, GI tract diseases (self reported)
学习计划
研究是如何设计的?
设计细节
队列和干预
团体/队列 |
干预/治疗 |
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Difference in Iron bioavailabilty exercise and resting phase
the subjects will act as their own control during the study
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the study foresees a measurement of iron biavailability in a resting and in a exercising phase and subjects will act as their own control during the study.
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研究衡量的是什么?
主要结果指标
结果测量 |
大体时间 |
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Iron bioavailability from Stable isotopic labels
大体时间:Up to 2 months
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Up to 2 months
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次要结果测量
结果测量 |
大体时间 |
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Blood volume increase during exercise
大体时间:Up to 2 months
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Up to 2 months
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其他结果措施
结果测量 |
大体时间 |
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Hepcidin levels and inflammation markers (C-Reactive Protein, 1-Alpha acid glycoprotein)
大体时间:Up to 2 months
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Up to 2 months
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合作者和调查者
出版物和有用的链接
一般刊物
- Cercamondi CI, Egli IM, Ahouandjinou E, Dossa R, Zeder C, Salami L, Tjalsma H, Wiegerinck E, Tanno T, Hurrell RF, Hounhouigan J, Zimmermann MB. Afebrile Plasmodium falciparum parasitemia decreases absorption of fortification iron but does not affect systemic iron utilization: a double stable-isotope study in young Beninese women. Am J Clin Nutr. 2010 Dec;92(6):1385-92. doi: 10.3945/ajcn.2010.30051. Epub 2010 Oct 6. Erratum In: Am J Clin Nutr. 2015 Apr;101(4):894.
- Moretti D, Mettler S, Zeder C, Lundby C, Geurts-Moetspot A, Monnard A, Swinkels DW, Brittenham GM, Zimmermann MB. An intensified training schedule in recreational male runners is associated with increases in erythropoiesis and inflammation and a net reduction in plasma hepcidin. Am J Clin Nutr. 2018 Dec 1;108(6):1324-1333. doi: 10.1093/ajcn/nqy247.
研究记录日期
研究主要日期
学习开始
初级完成 (实际的)
研究完成 (实际的)
研究注册日期
首次提交
首先提交符合 QC 标准的
首次发布 (估计)
研究记录更新
最后更新发布 (估计)
上次提交的符合 QC 标准的更新
最后验证
更多信息
与本研究相关的术语
其他研究编号
- EK 2012-N-27
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Exercise (Running)的临床试验
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University of Maryland, BaltimoreNational Institute on Aging (NIA)完全的