title: Physical activity is not related to semen quality in young healthy men.
abstract: OBJECTIVE
  To study the relationship of physical activity with semen quality among healthy young men from Spain.
  
  
  METHODS
  Cross-sectional study.
  
  
  METHODS
  University and college campuses of Murcia Region, Spain.
  
  
  METHODS
  Healthy young men with untested fertility (n = 215).
  
  
  METHODS
  A physical examination, blood and semen samples, and completion of a questionnaire.
  
  
  METHODS
  Semen quality parameters.
  
  
  RESULTS
  Physical activity was not related to semen quality parameters. The adjusted percentage differences (95% confidence interval) in semen parameters comparing men in the top quartile of moderate-to-vigorous physical activity (≥9.5 h/wk) with men in the bottom quartile (≤3 h/wk) were 4.3% (-30.2%, 38.9%) for total sperm count, 7.2% (-30.6%, 45.1%) for sperm concentration, -2.42% (-6.53%, 1.69%) for sperm motility, and 12.6% (-12.0%, 37.2%) for sperm morphology.
  
  
  CONCLUSIONS
  In contrast to previous research among athletes, these data suggest that physical activity is not deleterious to testicular function, as captured by semen quality parameters in this population of healthy young men in Spain.
authors: Division of Preventive Medicine and Public Health, Department of Health and Social Sciences, University of Murcia School of Medicine, Murcia, Spain. Electronic address: minguez@um.es.
authors: Lidia
authors: L
authors: Mínguez-Alarcón
authors: Departments of Nutrition and Epidemiology, Harvard School of Public Health, Boston, Massachusetts; Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts.
authors: Jorge E
authors: JE
authors: Chavarro
authors: Division of Preventive Medicine and Public Health, Department of Health and Social Sciences, University of Murcia School of Medicine, Murcia, Spain.
authors: Jaime
authors: J
authors: Mendiola
authors: Departments of Nutrition and Epidemiology, Harvard School of Public Health, Boston, Massachusetts.
authors: Audrey J
authors: AJ
authors: Gaskins
authors: Division of Preventive Medicine and Public Health, Department of Health and Social Sciences, University of Murcia School of Medicine, Murcia, Spain; Regional Campus of International Excellence "Campus Mare Nostrum," University of Murcia, Murcia, Spain; Department of Preventive Medicine, Reína Sofía University Hospital, Murcia, Spain.
authors: Alberto M
authors: AM
authors: Torres-Cantero
mesh_terms: D000293:Adolescent; D048430:Cell Shape; D064368:Healthy Volunteers; D006801:Humans; D008297:Male; D009043:Motor Activity; D055101:Semen Analysis; D013030:Spain; D013076:Sperm Count; D013081:Sperm Motility; D013094:Spermatozoa / Q000502:physiology*; D013997:Time Factors; D055815:Young Adult
keywords: Semen quality parameters; Spain; physical activity; young healthy men