Evidence map›Paper›PMID 34439983›Full record

ArticleBiology2021

Associations of Vitamin D Levels with Physical Fitness and Motor Performance; A Cross-Sectional Study in Youth Soccer Players from Southern Croatia.

Barbara Gilic, Jelena Kosor, David Jimenez-Pavon, Josko Markic, Zeljka Karin, Daniela Supe Domic, Damir Sekulic

Abstract read
In one paragraph

Article in Biology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.

0numbers the graph read from it
0cells of the map it votes in
5citing 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

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

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

5 citing papers in PubMed.

  1. Eight-Week Vitamin DNutrients · 2026
    Trial
  2. Trial
  3. Article
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  5. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors.

Barbara GilicFaculty of Kinesiology, University of Split, 21000 Split, Croatia.ORCID 0000-0002-8868-7315
Jelena KosorDepartment of Pediatrics, University Hospital of Split, 21000 Split, Croatia.
David Jimenez-PavonMOVE-IT Research Group, Department of Physical Education, Faculty of Education Sciences, University of Cadiz, 11519 Cadiz, Spain.ORCID 0000-0002-8977-4744
Josko MarkicDepartment of Pediatrics, University Hospital of Split, 21000 Split, Croatia.ORCID 0000-0001-9469-9278
Zeljka KarinTeaching Institute of Public Health of Split Dalmatian County, 21000 Split, Croatia.
Daniela Supe DomicDepartment of Medical Laboratory Diagnostics, University Hospital of Split, 21000 Split, Croatia.
Damir SekulicFaculty of Kinesiology, University of Split, 21000 Split, Croatia.ORCID 0000-0001-8022-7886

Funding

Hrvatska Zaklada za Znanost DOK-2018-09-1940Hrvatska Zaklada za Znanost IP-2018-01-8330
6 · The paper itself

Abstract

Vitamin D level is known to be a factor potentially influencing physical fitness, but few studies have examined this phenomenon among youth athletes. We aimed to evaluate the associations of vitamin D levels (as measured by 25-hydroxyvitamin D concentrations-25(OH)D) with various physical fitness and motor performance tests in youth football (soccer) players. This cross-sectional study included a total of 52 youth soccer players (15.98 ± 2.26 years old) from Southern Croatia. The participants were evaluated at the end of the winter period and data were collected of anthropometric measures (body mass and body height), vitamin D status (25(OH)D levels), physical fitness tests (sprints of 10 and 20 m, 20 yards test, the countermovement jump, the reactive strength index (RSI)) and motor performance tests (the soccer-specific CODS, the soccer-specific agility, and static balance). Among the studied players, 54% had 25(OH)D insufficiency/deficiency, showing a lack of 25(OH)D is widespread even in youth athletes living at a southern latitude. The 25(OH)D level was correlated with sprint 20 m, 20 yards tests, and RSI, showing a greater role of 25(OH)D in physical fitness tests where energetic capacity is essential than in sport-related motor performance tests where skills are crucial. Our results support the idea that vitamin D can play a determinant role in physical fitness tests with a clear physiological component, but is not crucial in motor performance tests related to specific sports where skills are a key component. Future studies should investigate the effects of vitamin D supplementation on the performance in physical fitness and motor performance tests among youth athletes.

Indexed as

25(OH)Dnon-planned agilityphysiology of performancespre-planned agilitypuberty

Identifiers

PMID34439983
PMCPMC8389772

What OpenQuestion holds

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LicenceCC BY
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Registered trials

None linked

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.