I have a few problems with this study. Love to hear other peoples input/explanations on this.
first one, it seems like self reporting. letting people fill in a questionnaire doesn't mean it's flawed but when it concerns some form of facebook advertisements I don't expect people to be that honest. I might be wrong here.
I might be biased here(I'm dutch), but the 25 miles seems low to me... by the standards of this study I'm a high intensity cyclist just because I travel to work, friends etc. on my bicycle. My friends who are fanatic cyclist usually cycle distances of 40+ miles...
I think the biggest flaw in this study is that they did not specify the type of saddle the rider is using. Typically, the complaints of ED, numbness, and loss of urinary control stem from poor fitting saddles (usually stock or those giant memory foam ones) that cause pressure.
Surely a cyclist who has invested this amount of time and money into his riding would have been properly fitted for a saddle.
PD45-05 THE IMPACT OF CYCLING ON MEN'S SEXUAL AND URINARY FUNCTIONS
Mohannad Awad, Thomas Gaither, Thanabhudee Chumnarnsongkhroh, Ian Metzler, Thomas Sanford, Gregory Murphy
San Francisco, CA, E. Charles Osterberg, Benjamin Breyer
The Journal of Urology
> INTRODUCTION AND OBJECTIVES
> Cycling provides many health benefits. Previously, concerns have been raised about cycling's impact on sexual and urinary health due to prolonged perineal pressure. We conducted an international survey of male athletes to determine the impact of cycling on urinary and sexual health.
> Cyclists were recruited to complete a survey through Facebook advertisements and outreach to English speaking sporting clubs across the world. Swimmers and runners were recruited as controls. Participants were queried about their physical activity and answered validated questionnaires including: The Sexual Health Inventory for Men (SHIM), International Prostate Symptom Score (I-PSS), and the National Institute of Health Chronic Prostatitis Symptom Index (NIH-CPSI). High intensity cycling was defined as cycling for more than 2 years, more than 3 times/week, and a daily average of more than 25 miles.
> Of the 5,851 respondents, 3,919 (67%) completed the survey. Of these, we included cyclists who do not regularly swim or run 1,642 (63%), and swimmers or runners who do not regularly cycle 975 (37%). After adjusting for age, body mass index, hypertension, diabetes, ischemic heart disease and tobacco use, cyclists had a higher mean SHIM score (20.1 vs 18.9) p<0.01, compared to non-cyclists. There were no statistically significant differences in I-PSS or NIH-CPSI scores between the two groups. High intensity cyclists had a significantly higher mean SHIM score compared to lower intensity cyclists (20.6 vs 19.5) p<0.01, but no significant differences were found in I-PSS and NIH-CPSI scores. After adjusting for age, cyclists had significantly higher odds of perineal numbness compared to non-cyclists, odds ratio=10.6 (95% confidence interval 8.3-13.7). Bike seat type had no significant effect in any of the above mentioned results.
> Contrary to prior studies suggesting that cycling may cause ED, our study shows that cyclists have no worse erectile function than non-cyclists. We also showed that cycling does not affect LUTS. Further research is warranted to gain insight into these results, but this study suggests that cardiovascular benefits of exercise may outweigh any theoretical deterrent of cycling.
Because a properly fit saddle has the rider resting on sit bones, not on the perineum.
If riding a saddle makes you numb or lose your ability to have sex, you're doing it 100% completely wrong and you shouldn't be allowed near a bicycle until you've had some education about it.