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BJU Int. 2019 Aug;124(2):336-341. doi: 10.1111/bju.14396. Epub 2018 Jun 7.

The association of bicycle-related genital numbness and Sexual Health Inventory for Men (SHIM) score: results from a large, multinational, cross-sectional study.

Author information

1
Department of Urology, University of California San Francisco, San Francisco, CA, USA.
2
Department of Surgery, King Abdulaziz University, Rabigh, Saudi Arabia.
3
Department of Urology, Stanford University School of Medicine, San Francisco, CA, USA.
4
Department of Biostatistics and Epidemiology, University of California San Francisco, San Francisco, CA, USA.

Abstract

OBJECTIVE:

To assess the association of genital numbness and erectile dysfunction in male cyclists.

SUBJECTS AND METHODS:

Cyclists were recruited through Facebook advertisements and outreach to sporting clubs. This is a secondary analysis of a larger epidemiological population-based study that examined sexual and urinary wellness in athletes. We queried cycling habits and erectile function using Sexual Health Inventory for Men (SHIM).

RESULTS:

A total of 2 774 male cyclists were included in the analysis. Amongst cyclists, there was a statistically significant increase in the trend of genital numbness presence with more years of cycling (P = 0.002), more frequent weekly cycling (P < 0.001), and longer cycling distance at each ride (P < 0.001). Less frequent use of padded shorts (odds ratio [OR] 0.14, P < 0.001) and lower handlebar (OR 0.49, P < 0.001) were associated with numbness, but body mass index (BMI) (OR 1.1, P = 0.33) and age (OR 1.2, P = 0.15) were not. In a multivariate logistic regression model, after adjusting for age, BMI, and lifetime miles (calculated by average daily cycling mileage × cycling days/week × cycling years.), there were no statistically significant differences in mean SHIM score between cyclists with and cyclists without numbness (20.3 vs 20.2, P = 0.83). However, interestingly, the subset of cyclists who reported numbness in the buttock reported statistically significantly worse SHIM scores (20.3 vs 18.4, P < 0.001). This association was not present in cyclists who reported numbness in the scrotum, penis, or perineum and remained significant after adjusting for overall biking intensity.

CONCLUSION:

Cyclists report genital numbness in proportion with biking intensity but numbness is not associated with worse sexual function in this cohort.

KEYWORDS:

bicycling; erectile dysfunction; genitalia; lower urinary tract symptoms; sexual dysfunction

PMID:
29790643
DOI:
10.1111/bju.14396

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