Cycling and Men's Health: Erectile Function, Prostate, and Hormones
Cycling is one of the best things a man can do for his heart, weight and longevity. It also has a persistent reputation for causing numbness, erection problems and prostate trouble. Our editorial team weighed the research to separate legitimate concerns from exaggeration and to outline simple steps that keep riding both enjoyable and safe.
The big picture: cycling is good for men
Before discussing risks, it is worth stating the obvious: regular cycling is strongly linked to better health. A systematic review by Oja and colleagues found consistent associations between cycling and improved cardiovascular fitness, lower cardiovascular risk and favorable body composition.
A large UK Biobank analysis published in the BMJ found that people who commuted by bike had a lower risk of cardiovascular disease, cancer and death from all causes compared with those who commuted by car or public transport.
These benefits also matter for sexual health. Erectile function depends on healthy blood vessels, and the same factors that harm the heart, including obesity, diabetes, high blood pressure and inactivity, are major causes of erectile dysfunction.
The real question, therefore, is not whether men should cycle, but how to minimize specific risks related to saddle pressure, very high training volumes and hormonal stress in endurance athletes.
Saddle pressure, numbness, and erections
When you sit on a traditional bicycle saddle, much of your weight can rest on the perineum, the area between the scrotum and anus. This region contains the pudendal nerve and arteries that supply the penis. Sustained pressure can temporarily reduce blood flow and nerve function.
Genital numbness after long rides is common and usually resolves quickly. Studies measuring penile oxygen levels have shown significant drops during seated riding on narrow, nose-heavy saddles, with improvement on noseless designs.
The link to lasting erectile dysfunction is less clear. Some earlier studies, particularly in police cyclists and high-mileage riders, suggested increased risk. However, a large multinational cross-sectional study by Awad and colleagues in 2018 found that cyclists did not have worse sexual function than swimmers or runners, though they reported more urethral strictures and genital numbness.
Similarly, the UK Cycling for Health study found no association between cycling volume and erectile dysfunction or infertility. Overall, the evidence suggests that for typical riders the benefits outweigh the risks, while persistent numbness is a warning sign worth addressing.
Prostate and PSA
Cycling does not cause prostate cancer. The UK Cycling for Health study reported a higher rate of prostate cancer diagnoses among men cycling more than 8.5 hours per week, but the authors cautioned that the finding could reflect more screening or chance and did not establish causation.
A practical issue is the PSA blood test. Pressure on the prostate from saddle sitting may temporarily raise PSA in some men, although study results are mixed. Many urologists advise avoiding cycling for 48 hours before a PSA test to reduce the chance of a misleading result.
Chronic pelvic pain and prostatitis-like symptoms are sometimes reported by cyclists. Saddle adjustments, padded shorts and reducing continuous seated time often help, but persistent symptoms should be assessed by a urologist.
Urethral strictures, a narrowing of the urethra, appeared somewhat more often in cyclists in the Awad study. Symptoms include a weak urine stream or straining, and they warrant medical evaluation.
Hormones, fertility, and bone health
Men who perform very high volumes of endurance training sometimes show lower resting testosterone levels. Researcher Anthony Hackney has described this as the "exercise-hypogonadal male condition." It is often associated with low energy availability and may partly reflect an adaptive adjustment.
For fertility, heat and pressure on the scrotum during long rides have been proposed as possible factors affecting sperm quality, but evidence in recreational cyclists is limited and inconsistent. Men trying to conceive who ride very heavily may wish to discuss this with a doctor.
Bone health is an underappreciated issue. Cycling is non-weight-bearing, and studies have found lower bone mineral density in some competitive road cyclists compared with runners and other athletes. Adding resistance training and impact activities helps.
| Area | Main concern | Practical response |
|---|---|---|
| Erectile function | Saddle pressure, numbness | Bike fit, saddle choice, standing breaks |
| Prostate / PSA | Temporary PSA rise | Avoid riding ~48 h before testing |
| Testosterone | Lower levels with extreme volume | Adequate energy intake, recovery |
| Bone density | Lack of impact loading | Strength training, jumping, running |
| Urethra | Strictures in some riders | See a urologist for urinary symptoms |
Men who notice fatigue, reduced libido and declining performance should have their energy intake and hormone levels assessed by a physician rather than self-medicating. Testosterone is a prescription-only drug in the US and is prohibited in tested sport.
Practical steps for healthy riding
Most problems related to cycling can be prevented with sensible equipment choices and habits. A professional bike fit is often the single most effective investment.
- Choose a saddle that supports the sit bones; consider cut-out or short-nose designs.
- Set the saddle level or with a very slight downward tilt and at the correct height.
- Wear well-fitting padded shorts without underwear to reduce friction.
- Stand on the pedals periodically during long rides to restore blood flow.
- Take numbness seriously; if it lasts after rides, adjust your setup.
Combine cycling with strength training two to three times a week for bone health, muscle balance and hormonal support.
Fuel your rides adequately. Chronic under-eating can lower testosterone and bone density and reduce training quality.
Editorial Team Conclusions
For most men, cycling is a net positive for cardiovascular, metabolic and sexual health.
Saddle pressure can cause temporary numbness and reduced blood flow, but large studies do not show worse erectile function in typical cyclists compared with other athletes.
A good bike fit, a suitable saddle, adequate nutrition and complementary strength training address the main concerns.
We also recommend our articles on testosterone in endurance athletes, bone health for cyclists, and how to prepare for a PSA test.
References
- Oja P, Titze S, Bauman A, et al. Health benefits of cycling: a systematic review. Scand J Med Sci Sports. 2011;21(4):496–509.
- Celis-Morales CA, Lyall DM, Welsh P, et al. Association between active commuting and incident cardiovascular disease, cancer, and mortality: prospective cohort study. BMJ. 2017;357:j1456.
- Awad MA, Gaither TW, Murphy GP, et al. Cycling, and male sexual and urinary function: results from a large, multinational, cross-sectional study. J Urol. 2018;199(3):798–804.
- Hollingworth M, Harper A, Hamer M. An observational study of erectile dysfunction, infertility, and prostate cancer in regular cyclists: Cycling for Health UK study. J Mens Health. 2014;11(2):75–79.
- Sommer F, Goldstein I, Korda JB. Bicycle riding and erectile dysfunction: a review. J Sex Med. 2010;7(7):2346–2358.
- Hackney AC. Hypogonadism in exercising males: dysfunction or adaptive-regulatory adjustment? Front Endocrinol (Lausanne). 2020;11:11.
- Schrader SM, Breitenstein MJ, Lowe BD. Cutting off the nose to save the penis. J Sex Med. 2008;5(8):1932–1940.
