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Semen quality and sedentary work position
Julie Støy1, Niels Henrik I Hjøllund, Jens Tølbøll Mortensen
1Department of Occupational Medicine, Aarhus University Hospital, Noerrebrogade 44, DK-8000 Aarhus, Denmark. stoey@stofanet.dk
International Journal of Andrology
|January 14, 2004
Summary
Sedentary work does not appear to negatively impact sperm count or semen quality. This study found no significant link between job-related sedentary behavior and abnormal semen characteristics in men.
Area of Science:
- Reproductive medicine
- Occupational health
Background:
- Elevated scrotal temperature can impair semen production.
- Previous research has not definitively linked sedentary work to reduced semen quality.
Purpose of the Study:
- To investigate the potential adverse effects of sedentary work on sperm count and semen parameters.
- To determine if occupational sedentary behavior is a risk factor for impaired male fertility.
Main Methods:
- Analysis of semen samples from 3119 men attending fertility clinics (1981-1983).
- Inclusion of lifestyle and occupational data from 2517 men via questionnaire.
- Utilized Danish Work Environment Cohort Study (DWECS) data for 1747 men (aged 18-39, >30h/week work) to estimate sedentary work levels.
Main Results:
- Sperm concentration was 30.6 million/mL (lowest sedentary quintile) vs. 40.5 million/mL (highest sedentary quintile).
- The observed difference in sperm concentration between sedentary work groups was not statistically significant.
- Stratification by infertility duration, education, fertility center, or spouse's fertility issues did not alter the findings.
Conclusions:
- The study's analyses do not support sedentary work as a risk factor for abnormal semen characteristics.
- Occupational sedentary behavior is unlikely to be a primary cause of impaired semen quality.