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Serious Cycling (More Than 3 Hours a Week) Could Endanger Men’s Sexual Health

Changing up your bicycle seat can help deflect ED risk

Extended cycling—more than three hours a week on a narrow, banana-shaped, “long nose” bike seat—can cause erection impairment.

Studies suggest an unusually high risk of erection problems in serious cyclists. — Istock

En español | Regular exercisers report fewer sex problems and more erotic enjoyment. But extended cycling — more than three hours a week on a narrow, banana-shaped "long-nose" bike seat — can cause erection impairment. Fortunately, cyclists can ride for any amount of time they like and incur a low risk of sex problems if they update their bike seats.

Think this is a modern affliction? Ha! As early as the fourth century B.C., Hippocrates speculated that the bouncing impact of long-duration horseback riding might cause erection loss. His observation was largely forgotten until the 1980s, when case reports appeared describing erection problems in healthy young men who had no risk factors but shared a devotion to cycling.

Subsequent studies suggested an unusually high risk of erection problems in serious cyclists. Norwegian researchers surveyed 160 young bicycle racers. Thirteen percent of them reported impotence and 21 percent experienced penile numbness.

Researchers with the Massachusetts Male Aging Study investigated bicycling and erection impairment in the study's 1,709 participants. As time spent cycling increased, so did erection problems. Doing this activity less than three hours a week caused no erection impairment, but based on the cyclist's age, longer-duration cycling raised the risk 72 percent above normal.

As researchers focused on cycling-related erection impairment, they quickly realized that the problem was not cycling per se but the seats (saddles) beneath riders. When men sit in chairs the "sit bones" of the buttocks bear the body's weight. But because long-nose saddles are too narrow to support the sit bones, cyclists who use them compensate by putting their weight on soft tissue known as the perineum. This mashes down not only the nerves involved in erection but the arteries that supply blood to the penis. Nerve compression can numb the penis; arterial compression limits blood flow into the organ. Acting together, the two can impair erections.

Worse, over time, compression of the arteries that run through the perineum can trigger the development of deposits (called atherosclerotic plaques) that narrow them, further limiting blood flow. So even though superfit elite cyclists typically show few plaques in their other arteries, they often suffer significant plaque formation in the arteries between their legs.

Next Page: A second cycling problem that hampers penile nerve function and blood flow. »

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