Evidence map›Paper›PMID 23380634›Full record

Observational studyBritish journal of sports medicine2015

Physical activity and television watching in relation to semen quality in young men.

Audrey Jane Gaskins, Jaime Mendiola, Myriam Afeiche, Niels Jørgensen, Shanna H Swan, Jorge E Chavarro

Abstract readObservational Study
PubMed Full text at PMC Publisher
In one paragraph

Observational study in British journal of sports medicine, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 58 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
58citing papers in PubMed, 4 pooled it
–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

58 citing papers in PubMed, 4 syntheses or guidelines pooled it.

  1. Pooled it
  2. Pooled it
  3. Pooled it
  4. Pooled it
  5. Trial
  6. Article
  7. Article
  8. Article
  9. Review
  10. Article
  11. Review
  12. Article
  13. Observational
  14. Review
  15. The influence of lifestyle and biological factors on semen variability.Journal of assisted reproduction and genetics · 2024
    Article
  16. Article
  17. Article
  18. Male infertility.Nature reviews. Disease primers · 2023
    Review
  19. Review
  20. Review
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.

Audrey Jane GaskinsDepartment of Nutrition, Harvard School of Public Health, Boston, Massachusetts, USA Department of Epidemiology, Harvard School of Public Health, Boston, Massachusetts, USA.
Jaime MendiolaDivision of Preventive Medicine and Public Health, University of Murcia School of Medicine, Murcia, Spain.
Myriam AfeicheDepartment of Nutrition, Harvard School of Public Health, Boston, Massachusetts, USA.
Niels JørgensenUniversity Department of Growth and Reproduction, University of Copenhagen, Rigshospitalet, Copenhagen, Denmark.
Shanna H SwanDepartment of Obstetrics and Gynecology, School of Medicine, University of Rochester, Rochester, New York, USA Department of Preventive Medicine, Mount Sinai School of Medicine, New York, New York, USA.
Jorge E ChavarroDepartment of Nutrition, Harvard School of Public Health, Boston, Massachusetts, USA Department of Epidemiology, Harvard School of Public Health, Boston, Massachusetts, USA Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts, USA.

Funding

Transgenic CoreP30DK046200 · NIDDK · TUFTS MEDICAL CENTER · PI GREENBERG, ANDREW S, PERISSI, VALENTINA · 1992 to 2021
$25.0M
TRAINING GRANT IN ACADEMIC NUTRITIONT32DK007703 · NIDDK · HARVARD UNIVERSITY (SCH OF PUBLIC HLTH) · PI CHRISTOPHER P DUGGAN, Frank B Hu · 1994 to 2026
$7.8M
NIDDK NIH HHS P30 DK046200NIDDK NIH HHS P30DK46200NIDDK NIH HHS T32 DK007703NIDDK NIH HHS T32DK007703-16PHS HHS 212844
6 · The paper itself

Abstract

backgroundSemen quality appears to have declined over the past decades but reasons for this decline are unresolved. The concurrent increase in sedentary behaviour may be a contributing factor. The objective of this study was to evaluate the relationship of physical activity and television (TV) watching with sperm parameters in a population of young, healthy men.

methodsMen aged 18-22 years (n=189) from the Rochester Young Men's Study (2009-2010) participated in this analysis. Physical activity (h/week of moderate and vigorous exercise) and TV watching (h/week of TV, video or DVD watching) over the past 3 months were assessed via questionnaire. Semen quality was assessed by sperm concentration, motility, morphology and total sperm count.

resultsSperm concentration and total sperm count were directly related to physical activity after multivariable adjustment (p-trend=0.01 and 0.04); men in the highest quartile of moderate-to-vigorous activity (≥15 h/week) had 73% (95% CI 15% to 160%) higher sperm concentration than men in the lowest quartile (<5 h/week). TV watching was inversely associated with sperm concentration and total sperm count in multivariable analyses (p-trend=0.05 and 0.06); men in the highest quartile of TV watching (>20 h/week) had 44% (95% CI 15 to 63%) lower sperm concentration than men in the lowest quartile (0 h/week). These measures of physical and leisure time activities were not significantly associated with sperm motility or morphology.

conclusionsIn this population of healthy men, higher moderate-to-vigorous activity and less TV watching were significantly associated with higher total sperm count and sperm concentration.

Indexed as

Sedentary BehaviorSemen AnalysisTelevisionAdolescentCross-Sectional StudiesExerciseHumansLeisure ActivitiesMaleSpecimen HandlingSperm CountSperm MotilityYoung AdultEpidemiologyUrology

Identifiers

PMID23380634
PMCPMC3868632

What OpenQuestion holds

Textmetadata
LicenceTDM
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.