title: Associations between physical activity and semen quality in young healthy men.
abstract: To evaluate whether the level of everyday physical activity is associated with semen quality in young men.
  
  
  
  Cross-sectional study.
  
  
  
  Universities, clubs, and societies.
  
  
  
  Young healthy men (aged 18-35 years) with unknown fertility (n = 177).
  
  
  
  Collection of data on medical history, lifestyle factors (physical activity, nutrition, addictions), and environmental threats (exposure of gonads to cellular phones, laptops). Collection of semen samples.
  
  
  
  Semen parameters.
  
  
  
  Men who were physically more active (3rd and 4th quartiles) had a higher percentage of immotile sperm than less active subjects (1st and 2nd quartiles). The mean (95% confidence interval) percentages were, respectively: 53% (38%-69%) and 51% (41%-61%) versus 38% (28%-49%) and 39% (29%-48%). Other semen parameters were unrelated to physical effort.
  
  
  
  Physical activity might be associated with an altered percentage of immotile sperm in young, lean, educated men who have not fathered children.
authors.affiliation: Department of Sports Medicine, University School of Physical Education, Wrocław, Poland. Electronic address: jozkow@gmail.com.
authors.forename: Paweł
authors.initials: P
authors.lastname: Jóźków
authors.affiliation: Department of Sports Medicine, University School of Physical Education, Wrocław, Poland; Department of Endocrinology, Diabetology and Isotope Treatment, Wroclaw Medical University, Wrocław, Poland.
authors.forename: Marek
authors.initials: M
authors.lastname: Mędraś
authors.affiliation: Department of Health Promotion, University School of Physical Education, Wrocław, Poland.
authors.forename: Felicja
authors.initials: F
authors.lastname: Lwow
authors.affiliation: Department of Nutrition, University School of Physical Education, Wrocław, Poland.
authors.forename: Aleksandra
authors.initials: A
authors.lastname: Zagrodna
authors.affiliation: Department of Nutrition, University School of Physical Education, Wrocław, Poland.
authors.forename: Małgorzata
authors.initials: M
authors.lastname: Słowińska-Lisowska
mesh_terms: D000293:Adolescent; D000328:Adult; D004522:Educational Status; D015444:Exercise; D006304:Health Status; D000070497:Healthy Lifestyle; D064368:Healthy Volunteers; D006801:Humans; D008297:Male; D010809:Physical Fitness; D013081:Sperm Motility; D055815:Young Adult
keywords: Semen quality parameters; physical activity; semen analysis