Evidence map›Paper›PMID 33804459›Full record

ReviewMedicina (Kaunas, Lithuania)2021

Vitamin D and Stress Fractures in Sport: Preventive and Therapeutic Measures-A Narrative Review.

Beat Knechtle, Zbigniew Jastrzębski, Lee Hill, Pantelis T Nikolaidis

Open access · goldAbstract readReview
In one paragraph

Review in Medicina (Kaunas, Lithuania), 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 35 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
35citing papers in PubMed, 3 pooled it
7.0field-weighted citation impact, top 2% of its field
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

35 citing papers in PubMed, 3 syntheses or guidelines pooled it, 62 citations in OpenAlex.

  1. Navicular fractures in elite athletes-2025 International Foot and Ankle Sports Consensus and systematic review.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2026
    Pooled it
  2. Pooled it
  3. Pooled it
  4. Trial
  5. Review
  6. Article
  7. Review
  8. Article
  9. Stress Fracture in Athletes: A Practical Approach.Journal of clinical medicine · 2026
    Review
  10. Article
  11. Article
  12. Review
  13. Article
  14. Article
  15. Article
  16. Review
  17. Review
  18. Pictorial Review of Paediatric Limp.Pediatric reports · 2025
    Review
  19. Article
  20. 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

4 authors at 4 institutions in 4 countries.

Beat KnechtleMedbase St. Gallen Am Vadianplatz, 9000 St. Gallen, Switzerland.ORCID 0000-0002-2412-9103
Zbigniew JastrzębskiDepartment of Health and Life Sciences, Gdansk University of Physical Education and Sport, 80-336 Gdańsk, Poland.ORCID 0000-0003-2006-125X
Lee HillDivision of Gastroenterology & Nutrition, Department of Pediatrics, McMaster University, 1280 Main St W, Hamilton, ON L8S 4L8, Canada.
Pantelis T NikolaidisExercise Physiology Laboratory, 18450 Nikaia, Greece.ORCID 0000-0001-8030-7122
Gdansk University of Physical Education and Sport · PLMcMaster University · CAUniversity of West Attica · GRUniversity of Zurich · CH

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

There are numerous risk factors for stress fractures that have been identified in literature. Among different risk factors, a prolonged lack of vitamin D (25(OH)D) can lead to stress fractures in athletes since 25(OH)D insufficiency is associated with an increased incidence of a fracture. A 25(OH)D value of <75.8 nmol/L is a risk factor for a stress fracture. 25(OH)D deficiency is, however, only one of several potential risk factors. Well-documented risk factors for a stress fracture include female sex, white ethnicity, older age, taller stature, lower aerobic fitness, prior physical inactivity, greater amounts of current physical training, thinner bones, 25(OH)D deficiency, iron deficiency, menstrual disturbances, and inadequate intake of 25(OH)D and/or calcium. Stress fractures are not uncommon in athletes and affect around 20% of all competitors. Most athletes with a stress fracture are under 25 years of age. Stress fractures can affect every sporty person, from weekend athletes to top athletes. Stress fractures are common in certain sports disciplines such as basketball, baseball, athletics, rowing, soccer, aerobics, and classical ballet. The lower extremity is increasingly affected for stress fractures with the locations of the tibia, metatarsalia and pelvis. Regarding prevention and therapy, 25(OH)D seems to play an important role. Athletes should have an evaluation of 25(OH)D -dependent calcium homeostasis based on laboratory tests of 25-OH-D

Indexed as

Fractures, StressVitamin D DeficiencyAgedDietary SupplementsFemaleHumansVitamin DVitaminsVitamin DVitaminsbonesmetabolismsexsportstress fracture

Identifiers

PMID33804459
PMCPMC7999420
OpenAlexW3134863314

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

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.