A number of studies have turned up a link between long-distance running and reduced fertility, although studies yet to discern what exactly the connection is. However, one popular theory points to a reduction in the blood supply to the testes during running. but....but why they do not have the same problem??? Anyone any idea?
Another question have been raised whether over-consumption of caffeine (around 10 cups of coffee a day) can also deplete testosterone levels.
A 2003 study at Sao Paolo University demonstrated that sperm motility (the speed of sperm reaching the egg) is actually stronger in men who regularly drink coffee than those who don't. Thus coffee intake cannot be identified as a guilty party
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