The standard bicycle seat can deliver a significant insult to the nerve and blood vessel supply to the male genitalia. There have been numerous studies investigating the relationship between bicycle riding and erectile dysfunction. The authors of a paper published a while back in The Journal of Sexual Medicine that reviewed the science set out to:

“…summarize accumulating data on the safety of bicycle riding based on medical evidence categorized by levels of evidence, including case reports, observational studies, case control studies, mechanistic studies, and population-based epidemiologic investigations. The secondary aim was to address the concerns of bicyclists and propose measures to minimize the risk of ED associated with bicycle riding.”

The mass of data revealed a clear picture and yielded specific recommendations:

“Bicycle riding more than 3 hours per week was an independent relative risk for moderate to severe ED. Therefore, bicycle riders should take precautionary measures to minimize the risk of ED associated with bicycle riding: change the bicycle saddle with a protruding nose to a noseless seat, change the posture to a more upright/reclining position, change the material of the saddle (GEL), and tilt the saddle/seat downwards.”

The authors note in their conclusion:

“Straddling bicycle saddles with a nose extension is associated with suprasystolic perineal compression pressures, temporarily occluding penile perfusion and potentially inducing endothelial injury and vasculogenic ED.”

In a subsequent paper published in the same journal this year the authors revisit the problem and begin by noting:

“For many years, reports in the literature have implicated bicycle riding as causing increased risk of erectile dysfunction (ED). Perineal compression during cycling has been associated with the development of sexual complications.”

They conducted a comprehensive review of the scientific literature and found that further studies had firmly established the risk of cycling-related sexual dysfunction and extended it to females:

“There is a significant relationship between cycling-induced perineal compression leading to vascular, endothelial, and neurogenic dysfunction in men and the development of ED. Research on female bicyclists is very limited but indicates the same impairment as in male bicyclists.”

The authors of a review published earlier in European Urology caution practitioners to be aware of this widespread phenomenon. They report that a range of problems have been documented:

“The most common bicycling associated urogenital problems are nerve entrapment syndromes presenting as genitalia numbness, which is reported in 50–91% of the cyclists, followed by erectile dysfunction reported in 13–24%. Other less common symptoms include priapism, penile thrombosis, infertility, hematuria, torsion of spermatic cord, prostatitis, perineal nodular induration and elevated serum PSA, which are reported only sporadically.”

They conclude by exhorting practitioners to be alert:

“Urologists should be aware that bicycling is a potential and not an infrequent cause of a variety of urological and andrological disorders caused by overuse injuries affecting the genitourinary system.”

Perhaps this could contribute, at least to some degree, occurrences of ‘cyclist road rage’. Are there any remedies or recommendations for cyclists to follow? Another study in The Journal of Sexual Medicine investigated the condition in police officers:

“The average bicycle police officer spends 24 hours a week on his bicycle and previous studies have shown riding a bicycle with a traditional (nosed) saddle has been associated with urogenital paresthesia and sexual dysfunction.”

The officers manifested the typical problems, but also demonstrated some improvement when using a ‘no-nose saddle’:

“(i) With few exceptions, bicycle police officers were able to effectively use no-nose saddles in their police work. (ii) Use of no-nose saddles reduced most perineal pressure. (iii) Penile health improved after 6 month using no-nose saddles as measured by biothesiometry and IIEF. There was no improvement in Rigiscan® [nocturnal erection] measure after 6 months of using no nose saddles, suggesting that a longer recovery time may be needed.”

It only makes anatomical sense that insult to the nerves and blood vessels that supply the genitalia could cause sexual dysfunction in both males and females.