"Most striking of all was the cancer risk among azoospermic men who first had their semen analyzed before age 30. They were more than eight times as likely to subsequently develop cancer than Texas males in the general population of the same age. In contrast, there was no relationship between age of semen analysis and risk of cancer for non-azoospermic men."
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"The objective of this study was to evaluate the relationships between semen quality and both phys- ical activity and TV watching among young, healthy men. We hypothesised that increased phys- ical activity was associated with higher sperm count, concentration and motility, and a lower pro- portion of morphologically abnormal sperm. Furthermore, we hypothesised that increased TV watching time was associated with decreased semen quality parameters."
"Future studies should also evaluate the extent to which different exercise types affect semen quality as previous studies suggest that there might be opposing effects of different types of activity on semen characteristics."