SynthesisInternational journal of molecular sciences2023
Difference in Levels of Vitamin D between Indoor and Outdoor Athletes: A Systematic Review and Meta-Analysis.
Synthesis in International journal of molecular sciences, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers, 2 of them syntheses that pooled it.
What it found
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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.
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.
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Who cites it
11 citing papers in PubMed, 2 syntheses or guidelines pooled it, 15 citations in OpenAlex.
- Risk of suicide, suicide attempt, and suicidal ideation among people with vitamin D deficiency: a systematic review and meta-analysis.BMC psychiatry · 2025Pooled it
- VITAMIN D AND INJURIES IN DANCERS: A SYSTEMATIC REVIEW.Acta clinica Croatica · 2023Pooled it
- Vitamin D3 supplementation enhances the effect of aerobic water-based training on physical fitness indices in obese and overweight menopausal women: A randomized controlled trial.Women's health (London, England)Trial
- Dietary assessment of elite orienteering athletes.Scientific reports · 2026Article
- The association of VDR gene polymorphisms with serum vitamin D levels and injury predisposition in elite athletes of Kazakhstan.European journal of applied physiology · 2026Article
- FokI Polymorphism of theNutrients · 2025Article
- Dietary Principles, Interventions and Oxidative Stress in Psoriasis Management: Current and Future Perspectives.Medicina (Kaunas, Lithuania) · 2025Review
- The Importance of Vitamin D and Magnesium in Athletes.Nutrients · 2025Review
- Vitamin D and its relationship to performance and health during a competitive period in elite women's basketball and volleyball players.Physiological reports · 2025Article
- Editorial of Special Issue "The Role of Vitamin D in Human Health and Diseases 3.0".International journal of molecular sciences · 2024Article
- The effect of aquatic training and vitamin D3 supplementation on bone metabolism in postmenopausal obese women.Journal of exercise science and fitness · 2024Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
6 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Vitamin D, its importance in different processes taking place in the human body, the effects of abnormal levels of this hormone, either too low or too high, and the need for supplementation have been extensively researched thus far. Variances in exposure to sunlight can cause vitamin D levels to fluctuate. Indoor activity can be a factor for these fluctuations and can lead to a decrease in vitamin D levels. We conducted a systematic review and meta-analysis aiming to identify whether indoor compared to outdoor training has a significant influence on vitamin D levels; we also performed subgroup analyses and multivariate meta-regression. The type of training has an impact on vitamin D levels that is influenced by multiple cofounders. In a subgroup analysis not considering cofounders, the mean serum vitamin D was 3.73 ng/mL higher in outdoor athletes, a difference which barely fails to achieve significance (
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Registered trials
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.