Evidence map›Paper›PMID 17473003›Full record

ArticleBritish journal of sports medicine2007

Regional bone mineral density in male athletes: a comparison of soccer players, runners and controls.

Michael Fredericson, Kelvin Chew, Jessica Ngo, Tammy Cleek, Jenny Kiratli, Kristin Cobb

Open access · bronzeAbstract readComparative Study
In one paragraph

Article in British journal of sports medicine, 2007. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 45 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
45citing papers in PubMed, 2 pooled it
4.8field-weighted citation impact, top 5% 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

45 citing papers in PubMed, 2 syntheses or guidelines pooled it, 155 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Trial
  4. Review
  5. Article
  6. The Muscle-Bone Unit in Male Elite Soccer Players Aged 14-19.Journal of functional morphology and kinesiology · 2025
    Article
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  18. The female athlete triad.Annals of joint · 2022
    Review
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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

6 authors at 4 institutions in 3 countries.

Michael FredericsonDepartment of Orthopaedic Surgery, Division of Sports Medicine, Stanford University, 300 Pasteur Drive, Stanford, California 94306, USA. mfred2@stanford.edu
Kelvin Chew
Jessica Ngo
Tammy Cleek
Jenny Kiratli
Kristin Cobb
Stanford University · USAlexandra Hospital · SGFlinders University · AUVA Palo Alto Health Care System · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectivesTo investigate the association of soccer playing and long-distance running with total and regional bone mineral density (BMD).

designCross-sectional study.

settingAcademic medical centre.

participantsElite male soccer players (n = 15), elite male long-distance runners (n = 15) and sedentary male controls (n = 15) aged 20-30 years. MAIN OUTCOME MEASUREMENTS: BMD (g/cm2) of the lumbar spine (L1-L4), right hip, right leg and total body were assessed by dual-energy x-ray absorptiometry, and a scan of the right calcaneus was performed with a peripheral instantaneous x-ray imaging bone densitometer.

resultsAfter adjustment for age, weight and percentage body fat, soccer players had significantly higher whole body, spine, right hip, right leg and calcaneal BMD than controls (p = 0.008, p = 0.041, p<0.001, p = 0.019, p<0.001, respectively) and significantly higher right hip and spine BMD than runners (p = 0.012 and p = 0.009, respectively). Runners had higher calcaneal BMD than controls (p = 0.002). Forty percent of the runners had T-scores of the lumbar spine between -1 and -2.5. Controls were similar: 34% had T-scores below -1 (including 7% with T-scores lower than -2.5).

conclusionsPlaying soccer is associated with higher BMD of the skeleton at all sites measured. Running is associated with higher BMD at directly loaded sites (the calcaneus) but not at relatively unloaded sites (the spine). Specific loading conditions, seen in ball sports or in running, play a pivotal role in skeletal adaptation. The importance of including an appropriate control group in clinical studies is underlined.

Indexed as

Absorptiometry, PhotonAdultBody Mass IndexBone DensityCross-Sectional StudiesHumansMaleRunningSoccer

Identifiers

PMID17473003
PMCPMC2465163
OpenAlexW2115258736

What OpenQuestion holds

Textmetadata
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.