Certain types of exercise can have a damaging effect on male sperm production. One of the worst forms of exercise for this is cycling or mountain biking. Mountain bikers have been proven to register less then half the sperm count and sperm movement than non-cyclists. The semen alterations are thought to be caused by impounding damage to both the testes and the scrotum, the repeated trauma is considered to be the main reason for the vascular damage and the subsequent effects on sperm motility.Originally Posted by adam&chryss
http://www.spermtest.com/causes_of_a...erm_counts.php
just takes time sometimes
