Downsides of cycling

Research On Bicycle Saddles And Sexual Health Comes Of Age

See above link for recent article about cycling induced erectile dysfunction. The reason:

"the high pressures in the perineum while straddling a saddle compress and temporarily occlude penile blood flow. They also hypothesized that the lining vessels of the compressed arteries become damaged, thus leading to potential permanent artery blockage.

However, not all men who ride bicycles will develop erectile dysfunction. One past study suggested that sexual health consequences adversely affect 5% of riders (based on survey data that would therefore include 1,000,000 riding men with ED). "

And this line I like:

"Schrader further concluded that "the health benefits from having unrestricted vascular flow to and from the penis are self-evident."

Indeed!