Micronutrients

Deakin, Vicki

doi:10.1002/9781444344905.ch8

Cited by 1 publication

(1 citation statement)

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“…serum ferritin and soluble transferrin receptor concentration were not associated with muscle strength, vertical jump performance or RSA [ 32 ]. The only iron indice correlation with muscle strength in studied ice hockey players was iron concentration, but due to of its high variability (large diurnal variation of around 30%) [ 33 ] the diagnostic utility of iron concentration in assessing iron status is rather low [ 34 ]. Because of it, the authors concluded that the relation between 25(OH)D concentration and exercise performance was neither facilitated nor supressed by the influence of iron status.…”

Section: Discussionmentioning

confidence: 99%

Vitamin D status and its relation to exercise performance and iron status in young ice hockey players

et al. 2018

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ObjectivesThe aim was to examine the association between serum vitamin D concentration and isometric strength of various muscle groups, vertical jump performance, and repeated sprint ability in young ice hockey players. The secondary aim was to determine the association between vitamin D deficiency and indices of iron status.MethodsFifty male ice hockey players (17.2±0.9 years) participated in this cross-sectional study. Exercise performance was evaluated using isometric strength measures of upper and lower extremities, vertical jump performance and repeated sprint ability (RSA). Blood samples were collected for the determination of serum 25-hydroxyvitamin D (25(OH)D) and multiple indicies of iron status.ResultsThe mean serum 25(OH)D concentration was 30.4 ng·ml-1 and ranged from 12.5 to 91.4 ng·ml-1. Eleven participants (22%) had vitamin D deficiency and 20 athletes (40%) had vitamin D insufficiency. Serum 25(OH)D concentration was not positively correlated with isometric muscle strength, vertical jump performance, or RSA after adjusting for age, training experience, fat mass, fat free mass and height. Serum 25(OH)D concentration was not associated with indices of iron status.ConclusionVitamin D insufficiency is highly prevalent in ice hockey players, but 25(OH)D concentration but it is not associated with exercise performance or indices of iron status.

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Section: Discussionmentioning

confidence: 99%