Evidence map›Paper›PMID 39755816›Full record

ArticleEuropean journal of applied physiology2025

Vitamin D status and its determinants in German elite athletes.

Sebastian Hacker, Claudia Lenz, Lukas Reichert, Robert Ringseis, Karen Zentgraf, Karsten Krüger

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In one paragraph

Article in European journal of applied physiology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 4 papers.

0numbers the graph read from it
0cells of the map it votes in
4citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

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Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

4 citing papers in PubMed.

  1. Article
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  4. FokI Polymorphism of theNutrients · 2025
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

6 authors.

Sebastian HackerDepartment of Exercise Physiology and Sports Therapy, Institute of Sports Science, Justus Liebig University Giessen, Kugelberg 62, 35394, Giessen, Germany. sebastian.hacker@sport.uni-giessen.de.ORCID http://orcid.org/0000-0003-1324-9510
Claudia LenzDepartment of Exercise Physiology and Sports Therapy, Institute of Sports Science, Justus Liebig University Giessen, Kugelberg 62, 35394, Giessen, Germany.ORCID https://orcid.org/0009-0002-8690-6526
Lukas ReichertWork Unit Movement and Exercise Science in Sports, Institute of Sport Sciences, Goethe University Frankfurt, Ginnheimer Landstraße 39, 60487, Frankfurt am Main, Germany.ORCID https://orcid.org/0000-0003-1743-0931
Robert RingseisInstitute of Animal Nutrition and Nutrition Physiology, Justus Liebig University Giessen, Heinrich-Buff-Ring 26-32, 35392, Giessen, Germany.ORCID http://orcid.org/0000-0002-1321-4820
Karen ZentgrafWork Unit Movement and Exercise Science in Sports, Institute of Sport Sciences, Goethe University Frankfurt, Ginnheimer Landstraße 39, 60487, Frankfurt am Main, Germany.ORCID https://orcid.org/0000-0002-1118-4015
Karsten KrügerDepartment of Exercise Physiology and Sports Therapy, Institute of Sports Science, Justus Liebig University Giessen, Kugelberg 62, 35394, Giessen, Germany.ORCID https://orcid.org/0000-0003-1506-8254

Funding

Bundesinstitut für Sportwissenschaft 081901/21-25
6 · The paper itself

Abstract

purposeThis study investigated elite German athletes to (1) assess their serum 25(OH)D levels and the prevalence of insufficiency, (2) identify key factors influencing serum 25(OH)D levels, and (3) analyze the association between serum 25(OH)D levels and handgrip strength.

methodsIn this cross-sectional study, a total of 474 athletes (231 female), aged 13-39 years (mean 19.3 years), from ten Olympic disciplines were included. Serum 25(OH)D levels were analyzed via liquid chromatography-mass spectrometry, and 17 single nucleotide polymorphisms (SNPs) related to vitamin D metabolism were determined using leukocyte DNA. Grip strength was measured unimanually using a hand-held dynamometer. Multiple linear regressions were used to analyze the influence of SNPs, age, sex, season (summer vs. winter), and discipline (indoor vs. outdoor) on 25(OH)D status. Linear regression analyzed the relationship between handgrip strength and serum 25(OH)D levels.

resultsIn total, 55.5% (n = 263) of athletes demonstrated insufficient serum 25(OH)D levels (< 30 ng/mL, < 75 nmol/L), with 16% (n = 76) showing levels below 20 ng/mL (50 nmol/L). After correction for multiple testing, significant influences on 25(OH)D levels were observed for the C allele of VDBP rs7041 (AC Genotype:

conclusionA high prevalence of insufficient 25(OH)D levels (< 30 ng/mL, < 75 nmol/L) was observed. We identified certain genetic variants as well as age and discipline as predictors of serum 25(OH)D levels. This knowledge may guide individualized diagnostic, nutritional, and supplementation strategies.

Indexed as

AthletesVitamin DVitamin D DeficiencyAdolescentAdultCross-Sectional StudiesFemaleGermanyHand StrengthHumansMalePolymorphism, Single NucleotideYoung Adult25-hydroxyvitamin DVitamin D25-Hydroxyvitamin DElite athletesSNPsVDBPVitamin D

Identifiers

PMID39755816
PMCPMC12174178

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.