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Dane publikacji

Relationships between vitamin D and iron status in male and female athletes

Artykuł
Czasopismo : International Journal of Sport Nutrition and Exercise Metabolism   Tom: 27, Zeszyt: Suppl 1, Strony: S11-S12
2017 angielski
Liczba arkuszy: 0,1
Link do publicznie dostępnego pełnego tekstu
Cechy publikacji
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  • Oryginalny artykuł naukowy
  • Zrecenzowana naukowo
  • Konferencyjna
  • Indeksowana w Web of Science
Dyscypliny naukowe
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Nauki o kulturze fizycznej , Nauki o zdrowiu
Dane konferencji
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  1. ISENC 16 International Sports and Exercise Nutrition Conference
  2. 2016-12-19 - 2016-12-21
  3. Newcastle, Wielka Brytania
Abstrakty ( angielski )
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Recent evidence suggests that vitamin D may affect iron regula- tion and erythropoiesis by its influence on hepcidin as well as on erythroid precursors. For these reasons deficit of vitamin D may deteriorate iron status and increase the risk of anaemia. We aimed to investigate whether vitamin D deficiencies have an impact on iron status in normal and iron-deficient athletes. The study included 290 healthy subjects (175 males and 115 females), aged 15-34 years, representing volleyball, cycling, canoeing, rowing, hockey, taekwondo and badminton. Blood for analysis was withdrawn in different seasons. Vitamin D status was assessed by measurements of 25(OH)D concen- trations in serum. To assess iron status the concentrations of ferritin, soluble transferrin receptor (sTfR), iron and total iron binding capacity (TIBC) were determined in serum. In addition to blood morphology, the mean erythrocyte and reticulocyte haemoglobin content (CH and CHr) and the percentage of hypochromic erythrocytes (HYPOm, LowCHm), reticulocytes (HYPOr, LowCHr) and microcytic erythrocytes (MICROm) were determined. Concentrations of 25(OH)D <10 ng/ml were classified as a deficit, values within 10-30 ng/ml as an insuf- ficient concentration, and values > 30 ng/ml as normal. The frequencies of subjects with 25(OH)D < 30 ng/ml were 48% and 60% in females and males respectively, wherein deficit of vitamin D (<10 ng/ml) was observed in 6% of females and 12.6% of males only. Iron deficiency (without anaemia symptoms) was identified in 42% of female and 13.7% of male subjects. Despite the high prevalence of low concentrations of vitamin D and iron deficiencies, regardless of gender there were no associations between vitamin D concentration and iron status indices concerning either serum variables (ferritin, iron, TIBC and sTfR) or any haematological, i.e. red blood cell and reticulocyte, indices. These results indicate that vitamin D status does not have an impact on indices of iron status at least in athletes with normal and latent iron deficiency. It cannot be excluded that more profound deficiencies of both vitamin D and iron are required to observe the relationship between them. The study was supported by the Ministry of Sport and Tourism of the Republic of Poland (2014-2016).
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