Most exercise appears to have little relationship to either the quality or quantity of sperm, but men who bike at least five hours a week have fewer and less active sperm than men who didn't exercise, a study said.
Research among competitive athletes has linked biking to genital or urinary problems and poor semen quality, said Lauren Wise at Boston University, who led the study published in "Fertility and Sterility." Previous research has suggested that competitive athletes may have issues with their sperm. But the study looked at the relationship between sperm health and exercise in 2,200 average men attending fertility clinics.
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| Semen slayer? |
Trauma or temperature increases in the scrotum may explain the relationship between biking and semen health, Wise said.
She also noted that it was possible that the men included in the study may not be representative of the general population, since they were all attending a fertility clinic and therefore more likely to have problems with their sperm.
SOURCE: link.reuters.com/qaq49q
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