Cycling saddle pressure and sexual health, and the noseless saddle that cut groin pressure by 66%

In February 2026 researchers in the UK published interviews with 20 competitive women cyclists, from club riders to elite racers. Every one of them had had saddle sores, most often on the vulva. Three described a permanent swelling of one outer labium that they blamed on badly fitting saddles, time-trial positions or long indoor sessions. One said a doctor had told her that women do not get saddle problems, only men do.

Men have had the louder warnings. In a 2001 German study, sitting on a saddle significantly cut the oxygen supply to the penis in over 70% of 40 healthy, athletic men, and 19% of those riding more than 400 kilometres a week reported erectile problems. Yet in 2018 a University of California, San Francisco (UCSF) team compared 2,774 male cyclists with 539 swimmers and 789 runners and found that the cyclists’ sexual and urinary function was no worse.

This article covers what saddle pressure does to men and women, where the problems concentrate, and what has been measured to help, from noseless saddles to handlebar height and standing breaks, and when to see a doctor. The conclusion is not to stop riding. It is to ride carefully and set the bike up well.

What saddle pressure does to the body

On a well-chosen saddle most of the rider’s weight rests on the two sit bones. On a narrow saddle, or when leaning far forward, it shifts onto the perineum, the soft area between the genitals and the anus. Through it run the pudendal nerve and the arteries that supply the penis, or the clitoris and labia. Squeeze them and the result is the familiar tingling or numbness, and less blood flow for as long as the pressure lasts.

The classic measurement is a small oxygen sensor taped to the glans of the penis. In a 2002 study of 20 healthy young men on a stationary bike, oxygen pressure fell by 82% on a narrow, heavily padded saddle and by 20% on a wide saddle with no nose. The authors concluded that width mattered more than padding. In the earlier study, standing on the pedals left oxygen unchanged.

How much penile oxygen falls on the saddle

Average fall in transcutaneous oxygen pressure at the glans while seated on a stationary bike, compared with the value before riding. 20 healthy men unless stated.

Narrow saddle, heavy padding82.4%

Narrow saddle, V-groove in the nose72.4%

Wide leather saddle, no padding63.6%

Wide saddle without a nose20.3%

Recumbent bike, reclined seat2.1%

Standing on the pedals (40 men)none

Sources: Schwarzer et al., European Urology (2002); Sommer et al., International Journal of Sports Medicine (2001); recumbent figure from Sommer et al. as pooled in Litwinowicz et al., Sports Medicine (2021).

Women show the same pattern. In 33 professional female cyclists, vaginal oxygen pressure started at about 70 mmHg and fell by 30 after 20 minutes on a traditional saddle, against 10 on a redesigned one. These are measurements over minutes, though. A meta-analysis of saddle strategies noted that most studies were short laboratory sessions that did not link pressure readings to clinical outcomes such as numbness or erectile function.

Where the risk concentrates

For men, the early alarm came from small or selected groups. A 2004 US study followed 463 cyclists who finished a ride of at least 320 kilometres: 31% had numbness during the ride, 4.2% reported new erectile problems a week later and 1.8% a month later. Numbness during the ride was the clearest warning sign, linked with 4.4 times the risk.

Large surveys tell a calmer story. Among 5,282 British cyclists, weekly riding time had no relationship with erectile dysfunction, while hypertension, smoking and being over 60 did. In the UCSF study the men who rode most had better erectile scores than those who rode least, although cyclists reported more numbness and more urethral strictures than swimmers and runners. A 2026 conference abstract pooling eight studies, with 4,729 cyclists and 2,843 non-cyclists, found no significant difference in erectile dysfunction.

Symptoms reported by male cyclists

Share of men reporting each symptom in four observational studies. Groups and definitions differ, so the rows are not directly comparable.

Genital numbness, 40 athletic men (2001)61%

Numbness during a ride of 320 km or more, 463 men31%

Erectile problems, men riding over 400 km a week (2001)19%

Erectile dysfunction in the past 5 years, 5,282 UK cyclists8.4%

New erectile problems one week after the long ride4.2%

Still present one month after the long ride1.8%

Sources: Sommer et al., International Journal of Sports Medicine (2001); Dettori et al., Journal of Urology (2004); Hollingworth et al., Journal of Men’s Health (2014).

Pooled numbers can be fragile. A 2020 meta-analysis found that, after adjustment, cyclists had twice the odds of erectile dysfunction, yet a 2026 review points out that removing a single occupational cohort from Kenya reversed the result to lower odds. What holds up across studies is the symptom: numbness is common, usually temporary, and best treated as a signal to change something.

For women the skin takes more of the load. The UCSF women’s study of 3,118 participants found cyclists no more likely than swimmers and runners to report sexual dysfunction or urinary symptoms; the most committed riders even had lower odds of sexual dysfunction. But they had far more numbness and saddle sores, and slightly more urinary tract infections.

Women cyclists compared with swimmers and runners

Adjusted odds ratios from the UCSF survey of 3,118 women; 1x means the same odds as non-cyclists. High intensity: riding for over 2 years, more than 3 times a week, over 25 miles a day.

Saddle sores, high-intensity riders22.7x

Genital numbness, high-intensity riders9.1x

Genital numbness, low-intensity riders6.5x

Saddle sores, low-intensity riders6.3x

Previous urinary tract infection, either group1.4x

Sexual dysfunction, high-intensity riders (0.6 to 0.95)0.7x

Source: Gaither et al., Journal of Sexual Medicine 15(4):510 (2018). Cross-sectional survey recruited online; it cannot show cause.

Recreational riders report the same. In a 2023 survey of 508 women from Devon cycling clubs, 44% had been put off cycling by vulval or perineal discomfort; pain, chafing and redness were the commonest complaints, and 9.8% had urinary infections they blamed on riding. At the elite end, long hours, low handlebars, time-trial positions and static indoor training push pressure further forward.

What has been measured to work

The best-tested fix comes from police work. US bicycle patrol officers spend about 25 hours a week in the saddle, so the National Institute for Occupational Safety and Health (NIOSH) asked 90 male officers from five cities to ride noseless saddles for six months. Pressure on the perineum fell by 66%. The share reporting no genital tingling or numbness rose from 27% to 82%, penile sensation and erectile function scores improved, and only three went back to a conventional saddle.

There is a price. Noseless saddles move weight backwards onto the sit bones, some riders find them less stable, and the police study had no control group. Pooled laboratory data show noseless designs cutting pressure at the front of the saddle by about 71%, above the roughly 60% thought necessary to relieve compression inside the perineum. Saddles with a central cut-out were less convincing: they lowered front pressure but did not significantly improve penile oxygen.

What a noseless saddle changed

NIOSH before-and-after study of 90 male bicycle police officers who rode noseless saddles for six months, with pooled laboratory data for comparison.

Officers free of genital numbness, before27%

Officers free of genital numbness, after six months82%

Fall in perineal pressure, police saddles66%

Fall in front-of-saddle pressure, laboratory studies71%

Officers who went back to a nosed saddle (3 of 90)3%

Sources: Schrader et al., Journal of Sexual Medicine 5(8):1932 (2008); NIOSH, publication 2010-163; Litwinowicz et al., Sports Medicine (2021).

Handlebar height is the next lever, and the evidence is mixed. In a US study of 48 competitive women, bars set lower than the saddle were linked with 3.47 kPa more perineal pressure and reduced sensation in the anterior vagina and labia. In the UCSF men’s study, low bars went with more numbness and saddle sores. But the 2004 long-ride study found more erectile problems with bars level or higher, and in the UCSF women’s study the link was not significant.

Cut-outs are not automatically better for women either. Among the same 48 cyclists, those on cut-out saddles had higher average perineal pressure than those on traditional ones, and four of the 20 women interviewed in 2026 developed sores on wide noseless saddles that were too wide for them. Fit matters more than category, which is why saddle fitters stress that there is no single perfect saddle.

Standing is cheap and safe. It restores penile oxygen, and men who stood for more than 20% of a ride had lower odds of numbness in the UCSF study; the common advice to stand every ten minutes is sensible, though the meta-analysis found no evidence for that particular interval. For the skin, riders relied on well-fitting padded shorts worn without underwear, changing straight after a ride and trimming rather than shaving, advice that rests on experience more than trials.

Why the answer is not to stop riding

Prostate worries follow a similar arc. In the British survey, men over 50 who rode more than 8.5 hours a week had 6.14 times the odds of reporting prostate cancer compared with those riding under 3.75 hours. But only 1.8% of the over-50s reported the disease at all, and the authors themselves said they could not tell whether the link reflected causation or diagnosis. A survey of 8,074 cyclists recruited through the Global Cycling Network found no association with prostate cancer or erectile dysfunction.

Riding can nudge the blood test, briefly. In 129 men aged 50 to 71, total prostate-specific antigen (PSA) rose by an average of 9.5% after a group ride of 55 to 160 kilometres, and six rather than two had levels above the usual 4.0 ng/ml cut-off. A 2022 randomised study of 101 men found no clinically relevant effect of cycling or rowing. Mentioning a long ride before a PSA test is sensible.

Prostate cancer and weekly riding time

Odds of reporting a diagnosis of prostate cancer among 2,027 UK cyclists over 50, by hours ridden a week, compared with under 3.75 hours. Cross-sectional and self-reported.

More than 8.5 hours a week6.14x

5.76 to 8.5 hours a week2.89x

3.75 to 5.75 hours a week2.94x

Under 3.75 hours a week (reference)1x

Source: Hollingworth et al., Journal of Men’s Health (2014). Only 1.8% of men in this age group reported the disease; Koupparis et al., Journal of Clinical Urology (2020), found no association in 8,074 cyclists.

None of this outweighs what riding does for the heart and metabolism, and as our article on cycling injuries and helmets shows, the bigger trade-offs involve traffic. Riding carefully here means a saddle that carries the sit bones, bars not set too low for comfort, regular standing, clean shorts and attention to warning signs. NIOSH tells riders to get off the saddle as soon as numbness or tingling starts.

See a doctor if numbness lasts for hours after riding or keeps coming back, if erections change, or if you notice a lump, a sore that will not heal or swelling of one labium. Saddle problems are a recognised issue in both sexes: a GP, urologist, gynaecologist or pelvic-health physiotherapist can help, and a professional bike fit often removes the cause.

What to do

Steps sorted by when they matter. Each one says how strong the evidence is: Measured Official advice Untested

Before

• Choose a saddle that carries your weight on the sit bones, and get a professional bike fit if you can. Fit matters more than any single saddle type. Official advice see Sources
• If numbness is a problem, try a noseless saddle. Police officers on them had 66% less perineal pressure, and the share free of numbness rose from 27% to 82%. Measured see Sources
• Avoid setting handlebars very low. Bars below the saddle raised perineal pressure in competitive women. Measured see Sources

If it happens

• Stand on the pedals regularly. Standing restores blood flow, and men who stood for more than 20% of a ride had lower odds of numbness. Measured see Sources
• Get off the saddle as soon as numbness or tingling starts, as NIOSH advises. Official advice see Sources

Afterwards

• Change out of padded shorts straight after a ride, wear well-fitting shorts without underwear, and trim rather than shave. This rests on experience more than trials. Untested see Sources
• See a doctor if numbness lasts for hours or keeps coming back, if erections change, or if you notice a lump, a sore that will not heal or swelling of one labium. Official advice see Sources
• Mention a long ride before a PSA blood test. PSA rose by about 9.5% after long group rides in men over 50. Measured see Sources

Questions people ask

Does cycling cause erectile dysfunction?

Large surveys of thousands of riders found erectile function no worse than in swimmers and runners. Problems cluster in very long rides and in men with persistent numbness, which is the warning sign to act on.

Is genital numbness after cycling harmful?

Usually it is temporary, but it means nerves and blood vessels are being compressed. Stand up, adjust the saddle and bars, and see a doctor if it lasts or keeps returning.

Are noseless or cut-out saddles better?

Noseless saddles cut perineal pressure sharply in police officers, but shift weight backwards and can feel less stable. Cut-outs help some riders and not others. The right width and position for your own anatomy matter most.

How can women prevent saddle sores?

Riders and researchers point to a saddle that fits, well-fitting padded shorts without underwear, avoiding very low bars, changing out of shorts promptly and trimming rather than shaving. Much of this rests on experience rather than trials.

The short version

• Sitting on a narrow saddle cut penile oxygen by about 82% in one study, against 20% on a wide noseless saddle; standing on the pedals left it unchanged.
• Large surveys found male and female cyclists no worse than swimmers and runners on sexual or urinary function, but with far more numbness and saddle sores.
• Noseless saddles cut perineal pressure by 66% in police officers, and the share free of numbness rose from 27% to 82% in six months.
• Low handlebars raised perineal pressure in women, but evidence on bar height is mixed; fit matters more than any single saddle type.
• Ride on: stand regularly, keep shorts clean and well fitting, and see a doctor if numbness lasts, erections change or a sore or swelling persists.

This is a summary of published research and reporting, not medical advice. If you have persistent numbness, pain, sores, swelling or changes in sexual or urinary function, talk to your doctor or a pelvic-health physiotherapist, and consider a professional bike fit.

Further reading: Awad et al., Journal of Urology (2018), for the large comparison of male cyclists with swimmers and runners. Schrader et al., Journal of Sexual Medicine (2008), for the police officers and noseless saddles. Burnie et al., Frontiers in Sports and Active Living (2026), for women’s own accounts of saddle sores.

Sources

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