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Association between vitamin D status and testosterone and cortisol in ice hockey players

Artykuł
Czasopismo : Biology of Sport   Tom: 35, Zeszyt: 3, Strony: 207-213
John S. Fitzgerald [1] , Joanna Orysiak [2] , Patrick B. Wilson [3] , Joanna Mazur-Różycka [4] , Zbigniew Obmiński [5]
2018-03 angielski
Liczba arkuszy: 0,5
Identyfikatory
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Cechy publikacji
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  • Oryginalny artykuł naukowy
  • Zrecenzowana naukowo
Dyscypliny naukowe
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Nauki o kulturze fizycznej , Nauki o zdrowiu
Słowa kluczowe
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Abstrakty ( angielski )
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The identification of the vitamin D receptor in tissues related to testosterone and cortisol production, iin conjunction with the observed correlations between vitamin D levels and these hormones in the general population, suggest vitamin D may influence testosterone and cortisol concentrations in athletes. A crosssectional study design was used to evaluate the association between 25(OH)D and testosterone and cortisol concentrations in young male ice hockey players (n = 50). All athletes were recruited during October from the Sosnowiec area, Poland (50° N). Commercially available ELISA kits were used to determine total serum 25(OH)D, testosterone and cortisol concentrations. Serum 25(OH)D concentration was analyzed as both a continuous and dichotomous variable, binned at the criteria for deficiency (< 20 ng·ml-1), to investigate a threshold effect. Neither continuous (r = 0.18, p = 0.20) nor dichotomous (r = 0.16, p = 0.27) 25(OH)D concentration was significantly correlated with testosterone concentration. A small, inverse correlation (r = -0.30, p = 0.04) was detected between 25(OH)D and cortisol concentrations when analyzed as a dichotomous variable only. Serum 25(OH)D concentration was neither associated with testosterone (p = 0.09) nor cortisol concentrations (p = 0.11) after adjusting for age, fat free mass and fat mass in sequential linear regression. The inability of vitamin D status to independently predict testosterone and cortisol concentrations suggests that any performanceenhancing effects of vitamin D in athletes are unlikely to be mediated primarily through these hormones, at least amongst young male ice-hockey players.
Bibliografia
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  1. 41 poz.
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