The BBC has announced the reason men cannot get pregnant...

Q/
In those who managed more than 186 miles a week on their bikes, the proportion of sperm that was the correct size and shape had fallen to 4%, the point at which men may struggle to conceive without fertility treatment.
/Q

"Elite cyclists 'risk infertility'"
http://news.bbc.co.uk/2/hi/health/8124458.stm

Apart from the typical pseudo-science blooper, does this research gives cause for concern?