The benefits from cycling grow and grow. If you are male and worried about getting your significant other pregnant, cycle more.
…researchers noticed “about a two-fold increased risk of ‘low sperm concentration’ and ‘low total motile sperm'” among men who biked for at least five hours per week compared to men who did not exercise regularly.
It’s not known why the counts were lower among serious cyclists. But Wise said the harmful effects could be the result of “mechanical trauma or a prolonged increase in core scrotal temperature.”